B Converting elastic potential energy to kinetic energy
Materials/apparatus: A toy car
Procedure:
1. A toy car is wound up.
2.The coil is stopped from being wound when it is tightened.
3. The toy car is placed on the floor and then released. Observations are recorded
Observation:
The toy car moves. After some time, it slows down and finally stops
Discussion:
When the toy car is wound up, energy is stored in the coil of the spring as elastic potential
energy . When the toy car is released, the coiled spring inside unwinds and the potential
energy stored in the coiled spring is used to move the car. The potential energy in the coiled
spring is changed to the kinetic energy of the car.
Conclusion:
Elastic potential energy can be changed to kinetic energy