A gramophone twin-table rotating at an angular velocity` 3frac(rad)(s)`, stops after one revolution. Find the angular retardation.

The spin dryer of a washing machine rotating at 15 r.p.slows down to 5 r.p.s. after making 50 revolutions. Find its angular acceleration.

A wheel starts from rest and acquires an angular velocity of 60 rad//s in half a minute. Then its angular acceleration is

A body starts rotating from rest and completes 10 revolutions in 4 s. Find its angular acceleration.

A particle is in circular motion in a horizotantal plane. It has angular velocity of 10 pi rad//s at the end of 2 s and angular velocity 15 pi rad//s at the end of 4s. The angular acceleration of particle is

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

The wheel of a car rotating with certain angular velocity is stopped in 7 seconds and before it stops, it makes 35 revolutions. Then initially it was rotating with the frequency.

A flywheel at rest is reached to an angular velocity of 36 rad//s in 6 s with a constant angular accleration. The total angle turned during this interval is

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

A large disc has mass 2 kg and radius 0.2 m and initial angular velocity 50rad/s and a small disc has mass 4kg and radius 0.1m and initial angular velocity 200 rad/s, both rotating about their common axis. Then the common final angular velocity after discs are in contact is,

A body of moment of inertia of 3 kg m^2 rotating with an angular velocity of 2 rad/s has the same kinetic energy as that of mass 12 kg moving with a velocity of