Best Egg Drop Contest Shock Absorber?

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The discussion focuses on a grade 7 student's egg drop project utilizing shock-absorbent materials like cardboard, styrofoam, and sponges. The student seeks assistance in understanding the physics of shock absorbency and creating a free body diagram. Participants encourage the student to explore existing designs and research shock-absorbing devices for inspiration. Additionally, they inquire about the specific rules of the contest to provide more tailored advice. Overall, the thread emphasizes the importance of research and understanding the underlying physics for successful project design.
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TL;DR Summary: egg drop report

i have an egg drop report, and my contraption is based off of shock absorbant materials (cardboard, styrofoam, and sponges). idk how to draw a free body diagram about this, or the physics behind shock absorbency. can someone help me please? (grade7)
 
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Welcome to PF. :smile:

What reading have you done so far on this project? What shock absorbing devices have you found in a Google Images search for such contests? Do they give you some ideas?

What are the contest rules?
 
Thread 'Correct statement about size of wire to produce larger extension'

Thread 'Correct statement about size of wire to produce larger extension'

The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...
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