Advanced Science Primary 6 Energy

A toy car is wound up and released. It travels across a rough carpet and eventually stops. Which of the following represents the primary energy conversion during this process?

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

Worked Solution

Step 1: Winding up the toy stores elastic potential energy. Step [2-9]: Releasing it converts the stored energy into kinetic energy (motion). Step [2-9]: Friction from the carpet converts kinetic energy into heat and sound until the car stops.

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

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