What fraction of translational kinetic energy of rolling circular disc to total kinetic energy ?

Options

A. `1//3`
B. 1
C. `2//3`
D. `1//2`

Answer

C

Explanation

`(KE_("trans"))/(KE_("roll"))=((1//2)mv^(2))/((3//4)mv^(2))=(2)/(3)`