Standard Science Primary 6 Energy

Which energy conversion takes place when a student uses a wind-up toy car?

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

Worked Solution

Step 1: Winding the toy compresses a spring, storing elastic potential energy. Step [2-9]: Releasing the car allows the spring to unwind, converting it to kinetic energy. Step [2-9]: Friction and movement also result in sound and heat energy.

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

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