Preflight

lecture preflight 08
1: Stopping something gradually increases the amount of time for stopping the object so the force can act on it longer. A smaller force can act on the object longer or a larger force can act on the object for a shorter period of time in order to stop the object.
2: I would make a bigger parachute so the box fell slower and maybe closer to the target.
3: I like to practice graphing the activities we do because I still get mixed up on how things should be graphed.
4: How does our eye see images upside down but then flip them right side up?

lecture preflight 08
1: Stopping something suddenly requires more force because you need to reduce the acceleration immediately to zero. When you stop something gradually, you have the chance to slowly reduce the acceleration to zero which requires less force.
2: Ours was awesome and didn't need to be much better, however it wasn't very accurate so I would probably change the shape of the parachute to ensure that it feel more evenly downward and landed more in the center of the bullseye.
3: Gravity has the same force on everything but the acceleration on different objects differs.
4: How does stickum loose its stick?

lecture preflight 08
1: When you stop something suddenly, it's like a hard wall of force hitting it, but if you gradually stop it, its more cushioning. For instance, when you catch a ball and reach forward to stop it, it usually makes a smack noise and hurts your hand from the force. When you catch it underhand its less forceful.
2: I think I would make the bag that the egg was is a little smaller or maybe even put it in a small cushioned box for better precision.
3: Using balloons makes the best parachute!
4: Today someone mentioned that if an egg is dropped and stays in the vertical position, it will never break because the two small ends of the egg are really strong. Is this true?

lecture preflight 08
1: because it is easier to stop a big force over a big space
2: i would allow more air pockets to be on all sides of the egg instead of just on the bottom. i would also make the parachute have a wider surface area
3: bread can stop an egg from breaking even from really high up
4: how do birds fly?/

lecture preflight 08
1: because an object is slowing down and is better controlled with the help of forces.
2: our groups egg drop device was fine since it reached the target area and the egg absorbed the impact due to the cushions made from the layers of bread.
3: the things we did in lab this week were fun.
4:

lecture preflight 08
1: Stopping something gradually requires less force because it allows more time for the slowdown to be carried out.
2: Yes, I would have changed the parachute because our egg didn't make it.
3: A tennis ball and a basketball will hit the ground at the same time.
4: What causes fog?

lecture preflight 08
1: Well stopping something suddenly there is an enormous back acceleration, while stopping something gradually has less of that acceleration.
2: I would make my device a little lighter and make sure it was even to the parachute. We had trouble making it a straight path.
3: I learned that a parachute can hold more than I thought.
4: How come tall buildings look like they are swaying?

lecture preflight 08
1: Stopping something suddenly requires instant force equal to the force that the "something" has to begin with. To stop it gradually, you can use a smaller force over a longer period of time and it will eventually stop the "something."
2: Our main problem was with our parachute-- same problem as the earlier experiment with the washer. Though our parachute worked well, it was hard to change the direction of it. So maybe if we had added small weights on each corner of our parachute, it would have weighed it down the right amount to provide direction and still air resistance.
3: Flax cookies actually taste good!
4: How does hair start going grey?

lecture preflight 08
1: By increasing the impact time, the amount of force is decreased because it is not all given at the exact same time.
2: I think we could have made the parachute more reliable so the chances of it landing on target would be greater.
3: I learned that it is almost impossible to break an egg if you wrap your hand around it and squeeze it really hard... but you have to do it right.
4: How and why does your skin become tan when it is exposed to the sun?

lecture preflight 08
1: When dropping the egg on a table, only the small edge touches the surface before it breaks. While when we dropped it on the bread, more surface area of the egg was able to touch the bread so the bread absorbed some of the energy.
2: I don't think i'd change anything, i'd just drop it from a different place to make it more accurate.
3: more about speed and gravity
4: whats at the bottom of the ocean?

lecture preflight 08
1: Because when something starts losing speed it will be easier to stop because the volocity will be less.
2: I would completely soround the egg will full ballons so that the egg cannot even touch the ground.
3: Eggs can land on bread withouth breaking.
4: How can penguins survive in cold weather?

lecture preflight 08
1: Basically, friction is what causes an object to stop sliding on forever with a constant velocity. Friction is however acting with the opposite reaction of another force. To stop this force suddenly would require a great deal of force. But friction stops an object from moving gradually, requiring less force to go to work at one sudden time.
2: Well first off I would have put a parachutte on it to make the landing a little more softer on the ground. I would also have put mor padding in our little egg socket to protect the egg more from hitting the hard surface and cracking.
3: Marshmellows are both a good padding device and a fun snack to eat in physics class!
4: What keeps the moon from crashing into the earth?

lecture preflight 08
1: When you increase the time the object has to stop, which is what you are doing when you gradually stop something (like cradling the egg when you catch it) it assists in lessening the force.
2: I would not have made the contraption that we put our egg in so heavy. The box and the amount of straws and marshmallows were heavy and unnecessary. It made the parachute less effective.
3: I learned that when you drop an egg on a table with no cushion, the reason it breaks is because when the egg hits the table all the force is on one spot. If you drop it on bread, there is more surface area and the force is more spread out on the bread and the egg does not break as easily.
4: How does wireless internet work?

lecture preflight 08
1: Stopping something gradually requires less force becuase you are applying it over a great amount of time. If you wanted to stop something suddenly you would need to apply a lot of force all at once.
2: I would have added more padding to the bottom of our egg holder. We had a parachute which worked nicely but it needed a little more padding to help lessen the impact of the floor.
3: That when two objects with similar air resistance are dropped at the same height at the same time they will hit the floor at the same time even though they may have different masses.
4: How do we know how old fossils are?

lecture preflight 08
1: Stopping something gradually requires less force because its a bigger area that the something is being stopped. Stopping something suddenly has a very small point of contact when gradually is a larger point of contact.
2: I would expand the parachute a little to slow it down a touch more. It went perfectly straight but a little too fast so when it hit our device turned over and broke the egg. Also, I would add a little more padding around the egg so it if did turn over again, maybe the extra production would save it.
3: I learned about what makes the best parachute and what did not work out that well.
4: What will happen when the glaciers melt?

lecture preflight 08
1: because there will be more impact if stopped suddenly in less time thus less force
2: decrease force and time, increase cushioning
3: eggs were cool
4: would this cusioning concept be applicable to other solids like drppping a piece of ice etc?

lecture preflight 08
1: Because just like the parachuttes, having a bag helps it slowly decrease in speed unlike a basketball when it drops and the only way to stop it is to put something heavier beneath it (i.e a person's hands or the ground)
2: To be honest, I loved our idea. Many other groups had so much 'stuff' surrounding their egg that it weight it down a lot and if there were balloons attached, it made their egg drift off towards the stairs. Our egg was placed into 5 pieces of bread, we strung it to the washer which was strung to the garbage bag. The egg survived AND we set a record for getting it the closest to the bullseye - 5 inches away :)
3: THAT THE ILLINI EGG IS THE BEST EGG EVER!!
4: How do you create perfume?

lecture preflight 08
1: Stopping something suddenly requires more force because you need to match the force with which the object is moving. A gradual stop requires less force because you are just slowing it down until it finally stops.
2: I would have added a parachute to keep it upright.
3: I learned that one major factor in the egg drop is the point where the egg hits. It is important to maximize the surface area as opposed to one point hitting.
4: How does a space shuttle transmit pictures from outer space to the space station when it is so far away and there are other possible interferences?

lecture preflight 08
1: By stopping something gradually you spread the force over the distance that you give, while if you stop something suddenly there is no give distance and the force is not spread over any distance.
2: Make the design better. We did very well on the tests, but got last for design.
3: When you use a parachute, the gravity force and air resistance force are equall.
4: We poked holes in our parachute for the egg drop because we thought it would slow the egg enough to not have the egg break and not have the egg move much. Does this make sense in physics terms?

lecture preflight 08
1: When you stop something suddenly there is a lot more momentum acting on you when you attempt to stop it. Wheras if you stop it gradually you are not dealing with all of the momentum from the object at once but rather gradually.
2: I really liked our design, I guess all that I would change to it would be to make the top parachute wider instead of leaving it in its usual bag shape.
3: I didn't realize that the egg didn't have to be that far off the table for it to crack, I thought we'd have to drop it at least 3 inches off of the table for it to crack.
4: What exactly is gravity and how does it stay constant?

lecture preflight 08
1: Because when you gradually do it you are just exerting less and less force however if you decide to stop it suddenly you are halting all motion and that requires a greater amount of force.
2: I would concentrate more on the parachute because if that acts correctly the egg is less prone to break.
3: that the force of gravity and air resistance is equal in a parachute.
4: What is the best way to form an egg drop design?

lecture preflight 08
1: There is friction, which will eventually help something slow down.
2: I would make a better parachute, so it would drift slower and hit the mark better.
3: Dropping the balls of the same size and shape but different masses, we found that they hit the floor at the same time. This was surprising because I thought the heavier the object, the faster it would fall.
4: How do they make marshmallows?

lecture preflight 08
1: Stopping something gradually requires less force because the force is applied for a longer period of time.
2: I would make sure that the egg was evenly surrounded, had a parachute and everything was balanced on each side. Ours was not even and didn't even make it to the ground.
3: I think it's very interesting that two objects of different mass and size hit the ground at the same time.
4: Why does the door to my dorm room only slam when the window is open?

lecture preflight 08
1: Stopping something gradually requires less speed and acceleration.
2: I would have added more soft support to the bottom of my device. I also would have added an evenly spaced parachute so it fell in a straight downward motion.
3: I learned the relationship of air resistance and force.
4: Why is the cap of a wave white?

lecture preflight 08
1: because as you stop something gradually, the force/impact is being absorbed, therefore is less.
2: it was good, it didn't break
3: i can drop an egg from 4 stories and not have it break
4: how do stick shift cars work?

lecture preflight 08
1: There is more time to resist and cushion the fall of the egg.
2: The parachute to be more accurate on the drop spot.
3: It is harder to break an egg if you squeeze at it from the ends.
4: I dont have any question.

lecture preflight 08
1: When you stop something gradually, you spread the force out (visually, it's kind of like the difference between having a liter of water in a bottle, as opposed to having a liter of bottle spread out in a big puddle - when it's in the bottle, all the water is concentrated)
2: Honestly, I think we could have done without the parachute and then it would have been more accurate (I remember when we did the same experiment in high school, all I used was a box full of packing peanuts and the egg survived)
3: I was fascinated with how effective the bread was at cushioning an egg! I expected the egg to break right away - the only reason our egg broke was because it hit the table.
4: What weather conditions are necessary for a tornado?

lecture preflight 08
1: Becuase it acts as a cushion. When you have to stop something suddenly you have to apply that equal amounth of force. When you gradually stop something the force can be applied less because of the longer amount of time it is being allowed to stop.
2: I think we would have added a parachute....it would have added the little bit of softness that we were missing.
3: I learned
4: How do cuts heal? Like scabs and stuff like that.

lecture preflight 08
1: Force equals change in momentum over time. So a larger time means less force.
2: Make our parachute better, it slowed it down a little bit, but not nearly enough. Our holder for the egg was pretty good though, seeing as how our egg still did not break when it hit the ground.
3: Dropping a piece of steel(heavy) and a piece of wood(light) of the same size and shape will hit the ground at the same time. But, if you go high enough to where they hit their terminal velocities, one will hit its max velocity first and so the other will hit the ground first.
4: How is a black hole formed?

lecture preflight 08
1: force is equal to change in momentum over change in time. therefore, as time increases (stopping gradually), force also decreases (which means there is less force needed).
2: made the parachute slightly smaller so that it didnt hit the side of the stairwell so easily...
3: Weight is needed for an accurate drop.
4: Why is soap bubbly? What makes the bubbles?

lecture preflight 08
1: Stopping something gradually, allows more time to stop. You will need more force to stop something suddenly because there isn't much time for it to slow down.
2: I really liked our egg-drop device, but if I would change anything I would secure our ziploc bag (that included the egg) better. We taped the sides of the bag to the balloons, but the tape didn't seem as secure as it could be. With extra tape, we could prevent any damages to the egg that might have occured if the ballon device flipped over.
3: Even though two objects may vary in weight, but there size and shape are the same, they will land on the ground at the same time.
4: I still don't understand how to equally space out the paperclips on the 8ft string. I know that it has something to do with squaring numbers (1,4,9,16), but I am still confused how these numbers tell us where to place the paperclips?

lecture preflight 08
1: Because you have to acknowledge the fact that when something is stopped over a longer period of time the resistance is less. Although it is still there it is less than when stopping suddenly
2: I would not change it in hindsight altogheter. However, if I were forced to make a change, the delivery of the egg via the parachute would be altered so that it was more accurate. Our 'egg-holding' device was well solidified, but the problem was the delivery with the parachute.
3: I learned that air/wind resistance or friction is the reason that some things fall faster than others.
4: Does a parachute work regardless of the weight that it is holding.

lecture preflight 08
1: When you stop something gradually, you are increasing the amount of time in which you take to stop it (like cradling the egg when you catch it). That, in turn, decreases the amount of force.
2: I would make the parachute more steady so that we could have a more accurate landing.
3: I learned why all the different balls landed at the same time when they are dropped together.
4: Why do some people's ears pop/hurt more than other's when they are traveling on a plane or in different elevations?

lecture preflight 08
1: When you stop something suddenly, you have to use a lot of force to stop it all at once. However, when you stop something gradually, you use a little bit of force for a longer time, so you are overall exerting a lesser force. This was seen in class when we were playing catch with the eggs, because we cradled the egg while catching it without realizing, stopping it gradually and using less force so the egg didn't crack.
2: Our device was good for the most part, as it was accurate and the egg was well-cushioned, but we did not anticipate the design to flip over when it hit the ground, which in turn broke our egg. I would put more cushioning on top of the egg for when it fell so that it had cushioning all over and not just underneath it.
3: I thought the experiment dropping the egg onto the table versus the bread was interesting because I could not believe how high we could drop the egg onto the bread from versus the millimeters we could drop the egg onto the table before it broke.
4: Why can it hail even when it is 60 degrees outside? Shouldn't it be really cold to be able to have icy precipitation?

lecture preflight 08
1: Because you are giving it a longer time to stop. By stopping it slower allows it more time to slow down and makes it softer or a cushion landing instead of just letting it slam into your hand or a hard surface. An arc is better than a straight hit into the surface.
2: Put a thrust underneath it so it takes longer to land.
3: That it is possible to squeeze an egg as hard as you can and it wont break unless you are extremely strong. Also the bread allowed a larger surface area to cushion the egg.
4: why do different color popsicles melt at different speeds?

lecture preflight 08
1: If you stop something gradually, the object can decrease in speed before it stops (like landing an egg on bread instead of a hard table)which will then require less of a force to stop it. If you stop something suddenly instead, you stop it at full speed, which requires more of a force.
2: I would change it to make it fall more straight down and be better balanced. I really liked the device that was made in our class by taping the balloons together underneath the egg. It was pretty balanced and created a really soft landing for the egg.
3: That you can drop an egg from a pretty big height onto bread and it won't break because the force is less.
4: Why does all tap water taste different?

lecture preflight 08
1: Because when stopping something suddenly, the force needed to stop that object is very great because the object is accelerating and moving fast. Wheras if you stop something gradually, you are decreasing the speed of that object, thus using less force to eventually stop that object.
2: We would have made a better base for the egg to fall on so there was more of a cusion to help with the fall.
3: I learned about different ways one can make a parachute.
4: Is there a planet that has no atmosphere? If so, how does that work?

lecture preflight 08
1: you would have to have a really srtong force to stop it suddenly.
2: add a parachute
3: everything falls at the same speed
4: how do heavy airplanes fly and stay in the air

lecture preflight 08
1: Because when you stop something suddenly you don't spread the force out over a longer period of time. When you stop something gradually the force spreads itself out over the surface of the object and therefore takes less immediate force to stop.
2: We would make its appearance more appealing to other people. We didn't focus on appearance, but what we did focus on (accuracy and durability) were very successful.
3: That despite the size of an object, the main contributor in how fast something falls is air resistance.
4: Why can't I get a signal on my radio at my home if the radio tower is right by my house? Is it possible that the radio tower is blocking the signal?

lecture preflight 08
1: When you stop something gradually, the force is spread out. When you stop something suddenly, all of the force is applied at one instance so it is stronger.
2: I would make the parachute balance the devise evenly (because it was crooked). I would also try to use less materials on the device so it is not so heavy.
3: Gravity causes uniform acceleration so all objects, regardless of weight, fall at the same speed.
4: what types of waves are used in wireless internet connections?

lecture preflight 08
1: It slows the acceleration down so that the impact is less at the stopping point.
2: I would design the holder for the egg to be lighter. Our box was heavy; therefore, the parachute was unable to support the weight.
3: I really liked the experiments for the lab this week. The experiments were perfect for my future classroom! I think that children would enjoy designing contraptions to hold eggs, and it would be fun to take the kids outside and conduct the experiments!
4: why do light bulbs burn out?

lecture preflight 08
1: Gradually stopping something is like providing a cushion for the fall or throw.
2: We could have worked a little on accuracy, because that was something we did not consider entirely and that's what made us fall behind.
3: Air resistance makes acceleration slower, but not necessarily decrease the speed at equal intervals.
4: Can cavities be reversed?

lecture preflight 08
1: Because the force is spread out over time.
2: make the parachute more even so that it could fall with greater accuracy.
3: More bags does not necessarily make more air resistance, jus tmore weight.
4: How does an air conditioner make the air cold?

lecture preflight 08
1: more time for resistance to play a part in stopping an object
2: i would make mine a bit more artistic. our group scored 140 out of 150.
3: It' extremely hard to make a wide parachute to go down straight.
4: none at the moment

lecture preflight 08
1: The impact will be much stronger if you stop something suddenly. With a stronger impact, it will take more energy to make the object stop.
2: I would have added more balloons to slow the fall.
3: I did not know that bread can stop and egg from breaking for so many feet. When I helped my sister with her egg drop last year, I did not even think of using bread.
4: Is it true that your house can explode from the differences in air pressure during a tornado?

lecture preflight 08
1: stopping something gradually requires less force because it expands the amount of force over a given amount of time.
2: make the parachute wider in order to ahve more air resistance
3: gravity acts on all objects equally, regardless of size or weight
4: how do the markers work that will only work on special paper?

lecture preflight 08
1: Stopping an object gradually requires less force because it has friction working with you to stop the object. On the other hand, to stop an object suddenly, you have to use all of your force to stop it, and friction works over time/distance.
2: We didnt attach a parachute, so the next time we should probably attach a parachute to the device.
3: Gravity has the same pull on every object.
4: what is with xmas lights going out because of one bulb, and why dont they make more strands of lights that dont all go out because of one?!

lecture preflight 08
1: Stopping something suddenly requires more force because the object is moving at a greater acceleration, therefore making the force bigger becauase F=ma.
2: I would've made a parachute for our device and have padded the egg better.
3: I loved the parachute part of the lab and I learned the greater surface area, the more air resistance.
4: Why do cows have spots?

lecture preflight 08
1: Because the bigget the delta t in the equation the lower the amount of force the impact is.
2: I would take more time to make a parachute that falls straighter and make my pod holding the egg so it sticks its landing instead of bouncing
3: long physics equations I'm glad I will never have to deal with again
4: How do aerosol cans work?

lecture preflight 08
1: An object that is stopped using less force means that it takes more time for the object to stop, since the mass of the object is the same. Newtons' Law=objects in motion tend to stay in motion and objects at rest tend to stay at rest unless a force acts upon it.
2: Ours tipped over when it landed, so I would've created a parachute in an attempt to keep the device from tipping over.
3: I learned that the size and shape of an object can effect the rate at which an object hits the ground (flat paper and crumpled paper)
4: Why does a baseball bat occasionally crack when it hits a ball?

lecture preflight 08
1: Stopping something gradually requires less force because it is a slower process. This allows for less energy to have to be used.
2: Our device itself worked pretty well. I think i would have tried to make a better parachutte that would have allowed it to go straight instead of having it slowly gravitate to the side like ours did. However our egg didnt crack which was the most important thing.
3: I learned that gravity causes uniform acceleration and thats why when you drop certain things that may have diferent masses, they drop at the same time due to gravity.
4: what is the difference betwen an acid and a base?

lecture preflight 08
1: Stopping something gradually requires less force because it occurs over a greater period of time and the opposing force is graduallly reduced to nothing.
2: I would put another layer or two of cushioning on the bottom so the egg is stopped even more gradually and decreasing the force on it.
3: I learned that in a vacuum, where air resistance is not a factor, a feather and any other object will drop at the same speed.
4: How do flowers and plants sense when to start blooming and growing in the spring?

lecture preflight 08
1: When stopping something gradually, the force of friction is helping you stop it. It gets slower and slower until it stops, so you don't have to try as hard to stop it. When you stop something suddenly, there is no force helping you to stop it.
2: We should have put a parachute on our "break box" and taken the weight off of the bottom of it!
3: When dropping eggs from four stories up, make sure you use a parachute to help the landing of the egg!
4: Why does your hair get frizzy when it is humid outside? Where does your skin go when you get a rug burn?

lecture preflight 08
1: Stopping something over time decreases the force needed.
2: I might add another parachute.
3: I learned that a tennis ball and a basket ball will hit the ground at the same time due to their shape being the same.
4: Why do some light bulbs burn out more quickly than others even if they have the same wattage?

lecture preflight 08
1: Stopping something gradually gives that thing more time to slow down. The more it slows down, the less force it takes to stop it completely because it's already partially stopped by the slow rate. Stopping something suddenly requires enough force to go from whatever speed to 0 immediately instead of gradually.
2: Our egg-drop device protected the egg well enough, but it was supported only by a bunch of balloons. I would add some sort of parachute so when we dropped the device we could be more accurate about where it landed.
3: Acceleration is constant for any object. I always thought that the heavier the object, the more acceleration is would have. However, there is a constant for acceleration for objects near the earth.
4: What is the best way, applying physics knowledge, to score the highest of the egg drop competition? What is the best model to create to protect the egg?

lecture preflight 08
1: Stopping something gradually requires less force than stopping it suddenly because you are increasing the amount of time that you are putting force on the object.
2: I would have added another piece of bread to the cushion that we made for the egg. Our design won, so I think it was pretty reliable.
3: I learned that objects will fall at the same speed no matter how much they differ in mass. (For example, a basketball and a tennis ball)
4: What is the best egg-drop device design that you have seen in your years teaching this class?

lecture preflight 08
1: F = ma. The mass of the object doesn't change. Acceleration is the change in velocity over time, so stopping an object suddenly requires a much greater negative acceleration, which requires more force.
2:
3: hard boiled eggs would make the egg drop much easier
4: how much weight can be put on an egg before it cracks.

lecture preflight 08
1: I think that something stopping suddenly goes from a very high velocity to no velocity extremely fast, which requires a greater force.
2: Overall, I thought our egg-drop devise was good. The one thing that I would change is making sure that the string holding our egg device to our parachute is securely fastened. During our flight, one of the strings fell off because the hole in our zip-lock bag became too large. Next time, we could put tape over the holes, making sure it would remain fastened.
3: I learned that it doesn't matter what the mass of an object is when dropping them. All objects will accelerate at the same rate downward.
4: Will the Earth always be at a 23 1/2 degree tilt?

lecture preflight 08
1: If you stop something gradually, the time of contact is greater so therefore the force is less.
2: We spent too much time trying to cushion the egg and not enough time making a good parachute.
3: a feather and a rock drop at the same time on the moon.
4: How do airplanes work?

lecture preflight 08
1: because when you slow something down slowly it is easier and requires less force each time to slow it down, rather than requiring the same amount of resistance to stop an object at full speed suddenly.
2: i would either fix the parachute or eliminate it to make it hit the bullseye better and closer.
3: i learned that a strofoam ball and a tennis ball fall hit the ground at the same time, despite the weight difference.
4: How do scientists make new flu vaccines every year if viruses mutate and are differ year after year?

lecture preflight 08
1: Stopping something gradually requires less force because of the longer time it has to stop. It doesnt need require the quick impact that stopping something suddenly would.
2: I would increase the size of my parachute and most likely have something a bit heaver than the cardboard box to place my egg in. My egg didnt break, but I think that would improve its accuracy a bit.
3: I learned about terminal velocity. The term's name itself is a bit misleading, because for some reason I keep thinking that terminal velocity would mean something is going really fast and that the force downward would be huge, but in reality the forces of gravity and air resistance are equal causing something to go at a constant speed.
4: Why do some scars take longer to heal than others even if they were caused by the same action?

lecture preflight 08
1: Force x change in time = change in momentum if you have gradual stopping time, then you have less force. If the change in time is small, then there's a larger force. The quantity of these terms make a difference.
2: I didn't make one. Silly flu, I miss the funnest lab of the year because of it!!!
3: ...the lab sounds interesting enough!
4:

lecture preflight 08
1: Since F * change in time = change in momentum if you have a gradual stopping time which means the change in time is large, then you need less force. If you have change in time really small, then you have a large force. Its the quantity of these two terms that make a difference.
2: We would make the force be spread out throughout the egg a lot more so it doesn't hit on one spot and we would make the time a lot larger so that the force will be small.
3: As long as air resistance is not a factor things having the same size and shape will hit the ground at the same time no matter what their weight is.
4: How many pieces of bread would you need to drop an egg from sears tower and not have it crack.

lecture preflight 08
1: It is more difficult and takes more energy to make something come to a complete stop. In a car crash, if a car comes to complete stop, it had to have hit something. Where as a car can come to a gradual stop anytime (as long as the brakes work).
2: I would not have simply stuffed a bag with marshmallows and bread. I would have taped 4 balloons together, and placed the egg in a padded clay box and put that in the center of the balloons.
3: Someone has actually survived jumping out of a plane after their parachute malfunctioned.
4: What makes heat travel upwards?

lecture preflight 08
1: Because you are able to absorb the velocity of the object causing less force on you.
2: I wouldn't. Our's was brilliant. Simple and sweet and we WON!!!
3: That the weight of objects does not affect the rate in which they fall. If they are dropped at the same time they should fall at the same speed and reach the ground at the same time.
4: How come glass breaks when a person sings very loud on a high pitch?

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1: Stopping something more gradually will require less force because you are moving away from the object at the same time instead of grabbing it right there. If you put less force on the object, it will stop more smoothly, just as in the throwing the egg example in class.
2: I would have made the strings attached to our bag a little bit longer, and tried not to put as much weight on it. Our egg did not break, but it was heavy, so it dropped faster than some of the others, so it could have broken.
3: I learned how to drop an egg succesfully from four flights of stairs!
4: I was wondering what would happen if the earth didn't have gravity.

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1: In this question, I think about slowly stopping or breaking at a stop sign in a car in comparison to slamming on your breaks.When you stop gradually you do not feel as much of a jerk because of less force is used. It stops the car over time instead of instantly when you slam the breaks and become jerked because the car is suddenly stopped. It required less force because you are slowly changing the distance in acceleration making it easier to stop.
2: Our egg-drop device was pretty good; we had the winning design. Maybe one was I would change the design would have been to change the parachute so that it would land more on target.
3: I learned how to use common household products to make an egg-drop device. I also learned how parachutes save lives when sky diving.
4: Why do people get shocked? Is it electricity? If so how does something like a blanket give off electric shocks?

lecture preflight 08
1: It requires less force because stopping something gradually means that you exert the force to stop it over a period of time versus all of a sudden
2: I would have made the parachute better so that when we dropped it off the stairs, it would not have moved so far away from the target
3: I learned to move into the catch when somebody throws an egg or a water balloon at me so it doesn't burst.
4: What causes a stigmatism in certain people's eyes?

lecture preflight 08
1: stopping the object gradually requires less force because you are not needing force equal to that of the object to stop it, but stopping something suddenly requires force equal to the object
2: we would use a parachute
3: how to drop and egg and not have it break
4: how do planes stay in flight?

lecture preflight 08
1: Stopping something gradually is over a longer period of time.
2: Well our egg didn't break, but it was 22 inches off of the middle of the target. So, I would try to weight the device a little more to achieve more accuracy.
3: Dropping the string with the paperclips was a great way to show how acceleration increases over time. It helped me to understand why that happens.
4: I saw on Mythbusters that a duck's quack barely has an echo. Why is this?

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1: It requires less force because it is spread out over a longer time and distance.
2: I would put a different parachute on our device because it could have been more accurate but the parachute made it move away from the target.
3: I learned what it takes to make a good parachute by comparing our design to other groups and seeing how differences made theirs better than ours.
4: Why do black objects become hotter than white objects when left out in the sun?

lecture preflight 08
1: since F=M*A, if the mass of an object is 10 and the acceleration is 50, then the force needed is 500 whereas if that same object of mass 10 has an acceleration of 2 then the force is 20. stoping something gradually will make it a slower acceleration and therefore smaller force
2: have equal sized balloons so that when it landed it didnt bounce and flop to the sides
3: the mass of an object doesnt make something fall faster than something lighter.. a basketball and paperclip will hit the floor at the same time
4: when drying your hands underneath a drier, do your hands dry faster if you rub them together or just hold them underneath?

lecture preflight 08
1: When stopping something suddenly, all of the impact is concentrated on one spot at one time, making it more difficult to stop. However, when stopping gradually, the force is more spread out. Therefore, it takes less force to stop the object gradually.
2: Ours worked really well (and won the competition) so I don't think I would change it. If anything, I would just try to figure out a way to make it more accurate on the target.
3: I had no idea that a piece of bread would cushion an egg that much.
4: How do cell phones work? I don't understand how someone so far away can hear what I'm saying into a phone.

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1: Because when you try stopping gradually,its accelerating less meaning you need to apply less force to stop it since the mass would stay the same.
2: Well, our egg apparatus won because we had a lot of support so the egg would not break. However, we could have made it more efficient by tying a bag with strings to make it into a parachute so there would be more air resistance. This would cause the egg device to fall slowly and not with some much force.
3: I learned that the more surface area there is in a parachute, the more air resistance there will be.
4: When you say force of gravity acting on an object, does that mean the weight or just gravity in general?

lecture preflight 08
1: When you are stopping something gradually, it has less acceleration and thus, the mass gets evenly distributed and it's easier to stop. When it is moving suddenly, its acceleration is much higher.
2: My team won the competition, which was very surprising. We provided enough cushion for our egg, but we could have created a device that would behave more like a parachute. We could attach a parachute made out of plastic bags and strings so the apparatus would flow better.
3: While designing a parachute, it is important to take the bag size into account because it fights off that much more air resistance.
4: How do clouds float?

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1: Gradually stopping something requires less force because it does so slowly at a more constant speed, while suddenly stopping must be done quickly and requires more energy to stop soemthing.
2: I would have not put a weight on the device. This helped in gaining points for accuracy, however, it made the device fall faster and hit the ground harder, breaking the egg.
3: i learned that the speed of falling with a parachute becomes more of a constant speed, rather then continuously slowing down slowly from air resistance.
4:

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1: when you stop something suddenly you exert all your force to stop it at one time. if you do it gradually you use a little force at each time a number of times.
2: wrap the egg completely so it has something soft to fall on when it hits the ground
3: what makes a good parachute
4: what material is the best for parachutes? that skydivers or the army use?

lecture preflight 08
1: WHen you stop it gradually, it slows down which causes less force to stop it completely. Cradling an egg will help it not break when just sticking your hand out will ensure it to break.
2: Figure out a way to make the the parachute slow down the egg gradually
3: Balloons do not help cushioning an egg
4: How is it the weatherman can be so wrong and say its going to rain and then it doesn't?

lecture preflight 08
1: Since you will be absorbing the objects velocity, you will only need to be moving along with the object. If you were to stop something suddenly, you would immediately stop its motion.
2: Well, since my team won (!!!), nothing? I would have liked to slow it down a little by making our chute wider to resist more wind. However, the rate at which ours fell helped it land so close to the target.
3: I thought it was interesting to see how two things of different weights would fall at the same rate and land on the ground at the same time.
4: Would a parachute work on the moon?

lecture preflight 08
1: stopping something suddenly requires more force because you are trying to bring a velocity to zero immediately. slowing it gradually to a stop is easier because you just want to decrease the velocity in increments.
2: i think that if we could make it heavier, but still held up by the parachute would have been better because we would have had more accuracy.
3: a basketball and a paperclp will hit the ground at the same time because air resistance is no longer a factor. i never knew this!
4: i understand the different characteristics of gravity in formulas and such, but why is there graity? what is pulling us to the ground? why?

lecture preflight 08
1: Stopping something gradually requires less force than stopping something suddenly because the more gradual than the more time is taken. With more time, there will be less impact.
2: I would put more cushion on top of the egg too because it flipped over and cracked on the side where there was no cushion.
3: I learned that gravity has the same force on objects no matter their mass like with the different balls we used.
4: How are skydivers parachutes made?

lecture preflight 08
1: Stopping something gradually requires less force because you destribute the force you are applying and it slows the velocity of the object every single time you apply a force. However, when you stop something suddenly, the force you have to apply is greater since the amount of time that has passed has not slowed the velocity of the object and you have not yet applied any force to help it come to a stop.
2: I would change my egg-drop design to make it better by making it less heavy so that it actually takes a greater amount of time to hit the ground.
3: One intresting thing that I learned in lab this week was that two objects of the same shape but different weight reach the ground at the same time regardless of thier weight. I always had thought that the heavier one would reach the bottom and vice versa.
4: How do digital cameras operate?

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1: this is because kinda like the flow of heat, the force is being absorbed by the thing stopping it.
2: first off i listened to all of the ideas and never voted for the group that won because i thought their idea was very good! BUT really i think we should have aimed a little better.
3: that channel 11 WTTW the window to the world programing is very informative, and a G-R-8 thing for kids to watch, that is where the straw idea came from! "ZOOM"
4: So when the package of a man's dress shirt says wrinkle free what does that really mean? i thought it was wrinkles come free with the shirt am i wrong?

lecture preflight 08
1: Since Work=Force x Distance, the longer the distance the less force is needed to stop an object. However, the shorter the distance more force is needed to stop an object.
2: I would make the egg-dropping device move slower through the air in order to help prevent the egg from cracking.
3: I learned about air resistance in lab this week.
4: How does ocean waves occur?

lecture preflight 08
1: Because stopping something slowly allows the object to decellerate over a distance.
2: Our device worked pretty good. I would have made the base a bit larger and the parachute larger to make it more accurate.
3: I found out that I can drop an egg pretty high on some bread without the egg breaking.
4: How does sunblock work?

lecture preflight 08
1: Stopping something suddenly requires more force because the amount of time is less and therefore the equation has to balance so an increase in force must occur. Stopping something over a long period of time requires less force because it can cross a greater distance before there is no more motion.
2: I would not use plastic because that seemed to catch the wind, causing it to follow a path that was not necessarily straight.
3: You can use paper clips along a string to demonstrate the acceleration of gravity.
4: What are all the elements that require a plane to stay in flight? Meaning, what amount of force is necessary to keep it flying?

lecture preflight 08
1: Force is equal to mass times acceleration and force will be less if the change in acceleration is much more gradual rather than sudden.
2: Put a better parachute on the egg-drop device and not as much stuff, we tried to shove every material around the egg and made it extremely heavy and not effective.
3: I was unaware of the idea of terminal velocity, is a concept that make sense because I know that skydivers don't just continue to gain speed but I didn't understand the concept of speed leveling out.
4: How do airplanes maintain a nearly normal air pressure when they reach their maximum heights? And why do our ears pop?

lecture preflight 08
1: Stopping something gradually requires less force because when you cradle an object you are allowing the object to slow down and you act as a cushion, like the bread acted as a cushion for the egg. On the other hand, when you stop something suddenly, there is a stronger force acting against the object, along with the other forces already acting on it.
2: I feel that the Black Stallion worked very well as our egg-drop device. We could have tried to make the device weigh less for a shorter landing.
3: I did not know that if you dropped a bowling ball and a golf ball off of a building at the same time that they would land on the ground at the same time. I never knew that mass really doesn't matter.
4: How can you get rid of the hiccups?

lecture preflight 08
1: When you stop something gradually, you use less force for a longer time, as oppose to more force for a shorter time.
2: I would have made our little holder more steady and secure, so the device would always land in the right way.
3: I learned what terminal velocity is.
4: How does a microwave work?

lecture preflight 08
1: there is more give. The object is allowed to gradually slow down its speed. It is using a smaller force over a longer time to stop an object.
2: I would have wrapped the egg more securely with protective surroundings, and used a heavier parachuting device so that it would have fallen more directly onto the target.
3: a good parachute does not have to be complicated, the simpler the better!
4: could life exist on the moon?