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.

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

A body has moment of inertia about its axis of rotation as 3 kg m^2 and angular velocity 3 rad/s. The kinetic energy of rotating body is same as that of a body of mass 27 kg moving with a speed of

Moment of inertia of a disc about the axis of rotation is 10 kgm^2 . A constant torque of 50 Nm acts on it. Find :Angular acceleration .

Moment of inertia of a disc about the axis of rotation is 10 kgm^2 . A constant torque of 50 Nm acts on it. Find :Angular velocity at the end of 10s, if the disc is initially at rest.

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.

The mass of an electron is 9.1 xx 10^-31 kg. If its K.E is 3.0 xx 10^-25 J . Calculate its wavelength.

If a solid sphere of mass 1kg and radius 3 cm is rotating about an axis passing through its centre with an angular velocity of 50 rad/s, then the kinetic energy of rotation will be

A wheel 2 kg having practically all the mass concentrated along the circumference of a circle of radius 20 cm is rotating on its axis with angular velocity of 100 rad/s, then the rotational kinetic energy of wheel is

The moment of inertia of a disc about an axis passing through its centre and perpendicular to its plane is 0.4 kg m^2 . Calculate its moment of inertia about its diameter

The energy of a photon is 10 xx 10^-19J .Calculate its wavelength.