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How to make an egg drop contraption?  

Answers:44   |   LastAnswerAt:2018.05  

Asked at 2011.04.21 02:40:23
For a project, I have to make a contraption that keeps an egg from breaking when it is dropped from a two story building. Our supplies given are:
Two plastic bowls
8 rubber bands
1 plastic bag
4 straws
8 inches of tape
1 small peice of cardboard
two napkins
and one paper clip.
Any feedback would be appreciated. Thank you.
answer tomsing98  Answered at 2011.04.21 02:40:23
Remember, an egg breaks because of the sudden acceleration at the ground, so anything you can do to lower that will help. The acceleration the egg experiences depends on how fast it's going, and how long it takes it to slow down. So anything you can do to slow it down before it hits, and anything you can do to increase the amount of time it takes to go from the impact velocity to zero, will help the egg survive. Also, anything you can do to spread the deceleration force over the surface will help, too.

I'd try making a parachute out of the plastic bag. (I'm picturing a shopping bag here, not a ziplock.) Maybe use the straws to hold it open so it catches the air. That will lower the impact velocity. But save a straw ....

In order to increase the time between the parachute hitting the ground and the egg coming to a stop, you might try to use the rubber bands. If you can use that last straw to point up into the bag, and then hang the egg from the top of it using the rubber bands, that means that the egg will start slowing down when the bottom straws touch the ground, but it will have a little bit of give as the rubber bands stretch.

That's what I'd do. Give it a couple of practice tosses if you can, to see how you can refine the design. Good luck!
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