Explain your design, the materials that would be used to construct it, its function, and the relative efficiency of your design compared to something that already exists and performs a similar function.

Use your knowledge of physics and engineering to design a device to meet one of the following criteria:

1) Design a device to minimize impact from a collision.
2) Design a device to convert one form of energy to another.

Explain your design, the materials that would be used to construct it, its function, and the relative efficiency of your design compared to something that already exists and performs a similar function.