WAEC Physics 2022 Objective — Question 3
Question 3 of 50 from the West African Examinations Council (WAEC) Physics 2022 Objective paper, with the correct answer and a full explanation.
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Suppose three identical steel balls Q, R and S are placed on an undulating ground as illustrated in the diagram above. Which of the balls is/are in neutral equilibrium?
- A. S onlyCorrect
- B. Q only
- C. R only
- D. Q and S only
Explanation
A ball on a flat/level surface is in neutral equilibrium since it neither returns to its original position nor moves further away when slightly displaced — this corresponds to the ball resting on the flat portion of the undulating ground (S).
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