A body rolls down an inclined plane. If its kinetic energy of rotation is 40% of its kinetic energy of translation, then the body is :

Options

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

Answer

B

Explanation

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