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JAMB Physics 2009 Question 6

Question 6

Equilibrium of Forces

Which of the diagrams below shows the position at which a small ball-bearing is in neutral equilibrium?

Diagram for this question
  1. A.A
  2. B.B
  3. C.C
  4. D.D
Show the answer and explanation

Answer: D (D)

Explanation

On a flat surface (D) the ball stays at rest wherever it is moved, so it is in neutral equilibrium. At the bottom of a bowl it is stable; on top of a dome it is unstable.