Advanced Science Primary 6 Energy

A toy car is released from Point A at the top of a track. It travels through a loop and stops at Point B. Which statement about its energy is correct?

A Energy is created as the car moves down.
B Total mechanical energy is constant even with friction.
C Its GPE is highest at Point B.
D Its kinetic energy is highest at the lowest point of the track.
Show Worked Solution

Worked Solution

Step 1: GPE is converted to kinetic energy as the car descends. Step [2-9]: Kinetic energy is maximum when GPE is minimum (lowest point). Step [2-9]: Friction converts some energy to heat/sound, so it eventually stops.

Correct answer: Its kinetic energy is highest at the lowest point of the track.

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