Which of the following bodies, each with centre of gravity G, lying on a horizontal table, is/are in unstable equilibrium?

Which of the following bodies, each with centre of gravity G, lying on a horizontal table, is/are in unstable equilibrium?

Answer Details

- I and II are in neutral equilibrium. They will roll continuously on the table
- III is a body with high centre of gravity (unstable)
- IV is a body with high centre of gravity (stable)