Question

A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (Kt) as well as rotational kinetic energy (Kr) simultaneously. The ratio Kt : (Kt +Kr) for the sphere is

(a) 7: 10

(b) 5:7

(c) 10 :7

(d) 2 :5

Answer 1

Correct option (b) 5:7

Explanation:

Translational kinetic energy, Kt = 1/2 mv2