Question

State the energy changes taking place when a toy car spring is wound and the car is made to move on level floor.

Answer 1

1. The toy car is wound (chemical energy in the person doing the winding to bio-mechanical energy to mechanical energy in the moving parts of the toy)
2. The mechanical energy is transferred via some gears and stored in a spring as potential energy.
3. The spring is allowed to unwind, transferring its potential energy via the gears to the wheels (mechanical energy)
4. The toy is propelled forward by the turning wheels by virtue of kinetic energy.