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About Steve Nelson
Expertise
I can answer most basic physics questions, physics questions about science fiction and everyday observations of physics, etc. I'm also usually good for science fair advice (I'm the regional science fair director). I do not answer homework problems. I will occasionally point out where a homework solution went wrong, though. I'm usually good at explaining odd observations that seem counterintuitive, energy science, nuclear physics, nuclear astrophysics, and alternative theories of physics are my specialties.

Experience
I'm a physics professor, research in nuclear astrophysics. I teach physics, nuclear chemistry, radiation safety, vacuum technology, and answer tons of questions as I tour schools encouraging students to consider careers in science.

Education/Credentials
Ph. D. from Duke University in physics, research in nuclear astrophysics reactions, gamma-ray astronomy technology, and advanced nuclear reactors.

You are here: Experts > Science > Physics > Physics > The Classic Egg Drop

Physics - The Classic Egg Drop

Expert: Steve Nelson - 11/4/2009

Question
This year, my Junior Physics teacher wants our class to compete at the Physics Fair in the Egg drop. So, my question is, how can I make a suitable device using renewable and biodegradable resources (Paper, cardboard; no plastic, etc) measuring 3x3x3? I have already tried a simple cardboard box, using masking tape and cotton balls as padding. It worked fine from about 10 feet, but after that the egg cracked. I'd like advice on materials to use and possible designs, please!

Thanks,

Emily

Answer
Well, you could use rubber. It's biodegradeable. You could make a sling of rubber bands and put them in a solid wooden frame to give the egg maximum deceleration capability. You also want to consider crush zones out of things like paper, and something to stabilize it so that the carton doesn't turn over. Trial and error will help more than anything. Make sure that the weak crush zones are first and the stronger ones to back it up at the end, that way as it's moving faster when the crush zones first start crushing the force won't be maximized but will be evened out during the stopping process.

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