Egg Drop Physics Challenge

Understanding Egg Drop Physics Challenge

A falling package does not keep gaining speed forever. Air pushes upward against the moving package. This drag force grows as speed rises.

Terminal velocity is reached when drag balances the package weight, so the speed becomes nearly constant. From a three metre drop, many compact egg packages do not have enough distance to reach terminal velocity. A wide parachute or a large, light structure may slow much more during the fall.

This is why shape matters before impact. A larger area facing downward usually creates more drag. Students should compare the actual fall time or use slow motion video rather than assuming every design lands at the same speed.

The most important part of the design is the stopping distance. A rigid box that stops over a very short distance gives the egg a sharp force. Soft materials compress, which lets the egg slow down over a longer time and distance.

Foam, sponge, crumpled paper, cotton, and bubble wrap behave differently because they have different stiffness. Very soft padding can fail if it compresses completely. Then the egg hits the hard base anyway.

Very stiff padding may barely compress, passing a large force to the egg. A useful design has enough thickness to compress without bottoming out. The egg should be held securely so it cannot strike the container walls after the outside package lands.

Mass creates a tradeoff. A heavier package has more momentum at a given speed, so it needs a larger impulse to stop. It has more impact energy too.

Extra mass can still help if it improves stability or allows stronger protection, but every added item should have a purpose. The centre of mass matters as well. A package with most of its mass low down is less likely to tumble.

A tumbling package may land on an unprotected edge. Students often meet the same ideas in bicycle helmets, car crumple zones, phone cases, sports mats, and shoe soles. These products manage impacts by spreading force over time, distance, or area.

A strong investigation changes one variable at a time. Keep the drop height, egg type, container size, landing surface, and release method as consistent as possible. Test several padding thicknesses or shapes, then repeat each condition enough times to notice random variation.

Record whether the egg survives, how far the padding compresses, package mass, fall time, and landing orientation. A stiffness versus survival rate chart can reveal that the best material is often in the middle rather than at either extreme. Include cracked eggs as failures even when the shell remains mostly intact.

Explain unusual results honestly, since an angled landing, a loose egg, or a different release can change the outcome. Good data shows not only which design worked, but why it worked.