A circular hoop rolls down an inclined plane. The ratio of its total energy to rotational kinetic energy is

Options

A. `2:1`
B. `1:3`
C. `3:1`
D. `4:1`

Answer

A

Explanation

`(KE_("roll"))/(KE_("rot"))=(1+K^(2)//R^(2))/(K^(2)//R^(2))=(1+1)/(1)=(2)/(1)`.