Advanced Science Primary 6 Energy

A toy car is wound up and released on a flat track. Which energy conversion takes place from the moment it is released until it stops?

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

Worked Solution

Step 1: The wound-up spring stores elastic potential energy. Step [2-9]: Upon release, this is converted into kinetic energy as the car moves. Step [2-9]: Friction converts the 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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