A body is rolling down an inclined plane. If kinetic energy of rotation is `40 %` of kinetic energy in translatory start then the body is a.

Options

A. solid cylinder
B. solid sphere
C. disc
D. ring

Answer

B

Explanation

`(1)/(2)l omega^(2)=40% " of "(1)/(2)mv^(2)=(40)/(100)((1)/(2)mr^(2)omega^(2))rArr l=(2)/(5)mr^(2)`
So, the body is solid sphere.