Question

A flywheel rotating about an axis experiences an angular retardation proportional to the angle through which it rotates. If its rotational kinetic energy gets reduced by ΔE while it rotates through an angle θ then 

(a) ΔE ∝ θ²

(b) ΔE ∝ √θ

(c) ΔE ∝ θ

(d) ΔE ∝ θ^3/2

Answer 1

Correct Answer is: (a) ΔE ∝ θ²