The challenge: To design a safety device that can hold an egg (passenger) on the model car and keep it from breaking as the car rolls down the ramp at increasing slopes. The target goal is to protect the egg during a roll down the ramp at a 50-degree angle without cracking.

Energy cannot be created or destroyed. The potential energy the egg has when it is at rest is converted into kinetic energy as it falls because of the force of gravityEnergy can be transferred from one kind to another, but it is never destroyed.