Advanced Science Primary 6 Energy

A toy car is wound up using a key and then released on a smooth floor. Which of the following shows the energy conversion that takes place?

A Chemical potential energy → Kinetic energy → Heat energy
B Kinetic energy → Elastic potential energy → Kinetic energy
C Elastic potential energy → Kinetic energy → Sound energy + Heat energy
D Gravitational potential energy → Kinetic energy → Sound energy
Show Worked Solution

Worked Solution

Step 1: Winding the toy compresses a spring, storing Elastic Potential Energy. Step [2-9]: Releasing it converts the stored energy into Kinetic Energy (motion). Step [2-9]: Friction between parts and the floor generates small amounts of Sound and Heat energy.

Correct answer: Elastic potential energy → Kinetic energy → Sound energy + Heat energy

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