If a person standing on a rotating disc stretches out his hands, the angular speed will

If a person sitting on a rotating stool with his hands outstretched, suddenly lowers his hands, then his

A person is standing on a rotating wheel. If the sits on the wheel, then the angular momentum of the system will

A person is standing on a rotating table with metal spheres in his hands. If he withdraws his hands to his chest, then the effect on his angular velocity will be.

Assertion: A boy is rotating in a rotating chair with some angular speed. Initially arma of the boy are stretched out. When boy folds his hands then angular speed increases Reason: Angular momentum of the system is conserved in absence of external torque.

A person is sitting on a rotating chair which is rotating with some angular velocity. Person is sitting on the chair with his arms folded. Now he slowly stretches his arm then

A person is standing on a rotating platform, with his arms at his sides. If he stretches his arms, then which of the following statements is correct?

If a gymnast sitting on a rotating disc with his arms out stretched suddenly lower his arms, then

A circular disc of moment of inertia I_(t) is rotating in a horizontal plane about its symmetry axis with a constant angular velocity omega_(i) . Another disc of moment of inertia I_(b) is dropped co-axially onto the rotating disc. Initially, the second disc has zero angular speed. Eventually, both the discs rotate with a constant angular speed omega_(f) . Calculate the energy lost by the initially rotating disc due to friction.

Is the angular speed of rotation of hour hand of a watch greater or smaller than the angular speed of earth's rotation about its axis ?