A pulley os radius 2m is rotated about its axis by a force `F= (20 t- 5t^2)` newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is `10kg m^2` the number of rotaitons made by the pulley before its direction of motion is reversed, is:

The moment of inertia of a solid cylinder about its axis of rotation is (MR^(2))/(2) . What is the value of the radius of gyration of the cylinder about this axis ?

A whel of mass 2kg an radius 10 cm is rotating about its axis at an angular velocity of 2pirad//s the force that must be applied tangentially to the wheel to stop it in 5 revolutions is

A whel of mass 2kg an radius 10 cm is rotating about its axis at an angular velocity of 2pirad//s the force that must be applied tangentially to the wheel to stop it in 5 revolutions is

A wheel having moment of inertia 2 kg - m^(2) about its axis, rotates at 50 rpm about the same axis . The torque required to stop the wheel in one minute is

A disc of radius 10 cm can rotate about an axis passing through its centre and perpendicular to its plane. A force of 10 N is applied along the tangent in the plane of the disc. If the moment of inertia of the disc about its centre is 5 kg m2, then the increase in the angular velocity of the disc in 10 s will be