Standard Science Primary 6 Energy

A ball is dropped from Point X and bounces at Point Y before reaching Point Z. Which of the following statements is TRUE about the energy of the ball?

A The kinetic energy at Y is zero.
B The potential energy at X is converted only into heat energy.
C The total energy of the ball remains constant throughout the motion.
D The ball has the most kinetic energy at Point Z.
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Worked Solution

Step 1: Recall the Law of Conservation of Energy (Energy cannot be created or destroyed). Step 2: Total energy in a closed system remains the same, though it changes forms (Potential to Kinetic to Heat/Sound). Step 3: Final Answer: Total energy remains constant.

Correct answer: The total energy of the ball remains constant throughout the motion.

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