The angular momentum of a body changes by `80 kgm^2s^-1` when its angular velocity changes from `20 rad s^-1` to `40 rad s^-1`. Find the change in K.E of rotation.

Angular momentum of body changes by 80 kg m2/s, when its angular velocity changes from 20 rad/sto 40 rad/s. Then the change in its kinetic energy is

If the momentum of a body of mass 10 kg is 20 kg m//s , find its velocity.

A solid sphere of radius 20 cm and mass 25 kg rotates about an axis through its centre. Calculate its moment of inertia. If its angular velocity the torque applied changes from 2 rad s^-1 to 12 omega rad s^-1 in 5 sec, calculate the torque applied.

A solid sphere of diameter 25cm and mass 25kg rotates about an axis through its centre. Calculate its moment of inertia, if its angular velocity changes from 2 rad s^-1 to 12 rads^-1 in 5 seconds. Also calculate the torque applied.

Angular velocity of hour arm of a clock, in rad//s , is

The moment if inertia of the earth about its axis of rotation is 9.83 xx 10^37 kgm^2 and if its angular velocity is 7.3 xx 10^-5 rad s^-1 . Calculate Kinetic Energy of rotation.

Solid sphere of diameter 25 cm and mass 25 kg rotates about an axis through its center. Calculate its moment of inertia , if its angular velocity changes from 2 rad/s to 12 rad/s in 5 second. Also calculate the torque applied.

The moment if inertia of the earth about its axis of rotation is 9.83 xx 10^37 kgm^2 and if its angular velocity is 7.3 xx 10^-5 rad s^-1 . Calculate Radius of gyration

The angular speed of a particle, moving along a circle of radius 20cm, increases from 2 rad/s to 40 rad/s in 19 s. The ratio of its centripetal acceleration to tangential acceleration at the end of 19 secs

An electric motor of 12 horse-power generates an angular velocity of 125 rad//s . What will be the frequency of rotation?