Standard Science Primary 6 Energy

A toy car is wound up and released on a flat surface. What is the energy conversion involved?

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

Step 1: Winding up stores elastic potential energy in the spring. Step [2-9]: Releasing it converts the stored energy into motion (kinetic energy). Step [2-9]: Friction causes some energy to be lost as heat.

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

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