Class XI The M.I. of a body about a given axis is 1.2 kg m2m2. Initially the body is at rest. In order to produce a rotational kinetic energy of 1500 joule, an angular acceleration of 25 rad/ sec2sec2 must be applied about that axis for duration of 10 sec 2 sec 4 sec 9 sec If a gymnast sitting on a rotating stool with his arms outstretched, suddenly lowers his hands his moment of inertia decreases the angular velocity stays constant the angular velocity decreases the angular momentum increases a body is rotating about z axis with a speed ωω and a point is at a distance of r in the x-y plane then the velocity of the point is rω 3rω rω/2 2rω A particle is orbiting in a vertical plane. Its linear momentum will be directed at 45∘∘ to the vertical tangential to the orbit vertically horizontally A constant torque acting on a uniform circular wheel changes its angular momentum from A0A0 to 4 A0A0 in 4 seconds. The magnitude of the torque is A0 3 A0A0/4 4 A0 12 A0 Do you really want to submit this quiz? Cancel Submit Quiz