Which of the following bodies, each with centre of gravity G, lying on a horizontal table, is/are in unstable equilibrium?
A.
II only
B.
III only
C.
I & IV only
D.
II & III only
Correct answer is B
- I & 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)