The part of total kinetic energy is the rotational kinetic energy of a solid ball rolling over a horizontal plane is

Options

A. `2//5`
B. `2//7`
C. `1//2`
D. `3//4`

Answer

B

Explanation

`(KE_("rot"))/(KE_("roll"))=((1//2)I omega^(2))/((1//2)mv^(2)(1+K^(2)//R^(2)))`