If a spherical ball rolls on a table without slipping, the fraction of its total energy associated with rotation is -
(a) `2/5` (b) `2/7` (c) `3/5` (d) `3/7`

Options

A. `3//5`
B. `2//7`
C. `2//5`
D. `3//7`

Answer

B

Explanation

Fractions `=(1//2(2//5 mr^(2))(v/r)^(2))/(1/2mv^(2) + 1/2(2//5 mr^(2))(v/r)^(2)) = 2/7`