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JAMB Physics 2011 Question 8

Question 8

Equilibrium of Forces

The diagrams above show the positions of a cone. The position which can be described as neutral equilibrium is represented as

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

Answer: C (Z only)

Explanation

A cone lying on its side (Z) just rolls to a new position and stays there, so it is in neutral equilibrium. On its base (Y) it is stable; on its apex (X) it is unstable.