Calculate the moment of inertia of a fly wheel, if its angular velocity is increased from 60 r.p.m. to 180 r.p.m. when 100 J of work is done on it.

When 100 J of work is done upon a fly wheel, its angular speed increases from 60 rpm to 180 rpm. What is its moment of inertia?

Moment of inertia of a wheel is 0.004 kg. m^(2) . If its number of revolutions is increased from 60 rpm to 150 rpm in 3 s, determine the magnitude of the torque acting on it.

Moment of inertia of a plate,is 40 kgm^2 . How much work to be done to change its angular velocity from 60 rpm to 150 rpm.