Standard Science Primary 6 Energy

A ball was released from Point A and rolled down a track to Point B. Which of the following correctly describes the energy changes?

A Chemical potential energy decreases; Heat energy increases.
B Gravitational potential energy increases; Kinetic energy decreases.
C Gravitational potential energy decreases; Kinetic energy increases.
D Kinetic energy remains constant; Potential energy increases.
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Worked Solution

Step 1: Point A is higher than Point B. Step 2: As the ball rolls down, it loses height (Gravitational Potential Energy decreases). Step 3: As it rolls, it gains speed (Kinetic Energy increases).

Correct answer: Gravitational potential energy decreases; Kinetic energy increases.

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