The kinetic energy of a rolling solid cylinder of mass `4kg` about it axis of rotation is `20kgm^(2)s^(-2)`. Calculate the velocity with which it is moving.

Explanation

`M.I.` of solid cylinder `=(1)/(2)MR^(2)`, `K=(1)/(sqrt(2))R`
`v_(cm)=sqrt((2xx20)/(4(1+(1)/(2))))=sqrt((2xx20xx2)/(4xx3))=sqrt((20)/(3))m//s`
Hint. `v_(cm)=sqrt((2K.E)/(m(1+(k^(2))/(R^(2)))))`