A child stands at the centre of turntable with his two arms out stretched. The turntable is set rotating with an angular speed of 40 rpm. How much is the angular speed of the child if he folds his back and thereby reduces his moment of inertia to `(2)/(3)` times the initial value ? Assume that the turntable rotates without friction

(i) A child stands at the centre of turntable with his two arms out stretched. The turntable is set rotating with an angular speed of 40 rpm. How much is the angular speed of the child if he folds his hands back and thereby reduces his moment of inertia to (2)/(3) times the initial value ? Assume that the turntable rotates without friction (ii) Show that the child's new kinetic energy of rotation is more than the initial kinetic energy of rotation. How do you account for this increase in kinetic energy ?

A child stands at the centre of a turn table with his two arms outstretched. The turn table is set rotating with an angular speed of 40 rpm. How much is the angular speed of the child, if he folds his hands back reducing the moment of inertia to (2//5) time the initial value ? Assume that the turn table rotates without friction. (b) Show that the child's new K.E. of rotation is more than the initial K.E. of rotation. How do you account for this increase in K.E. ?

A man stands at the centre of a circular table with his two hands outstretched. The table is set into rotation with an angular speed of 40 rev/min. What is the angular speed when the man folds his hands back and thereby reduces his moment of inertia 2/5 times the initial value? Assume that the table rotates without friction.

A child stands at the turn table center of a turnable with his two arms outstretched. The turnable is set rotating with an angular speed of 10 rad//s . If the child folds his hands back so that the moment of inertia reduces to 3//5 times the initial value, find the new angular speed. Why does the kinetic energy of child increase?

A child is standing with his two arms outstretched at the centre of a turntable that is rotating about its central axis with an angular speed omega_0 . Now, the child folds his hands back so that moment of inertia becomes 3 times the initial value. The new angular speed is.

A man standing at the centre of a rotating table, with his hands stretched outwards. The table is rotating at the rate of 30 rev/minute. If the man brings his hands towards his chest and thereby reduces his moment of inertia to (3)/(5) times of its original moment of inertia, then the number of revolutions performed by the rotating table per minute will be

A preson is standing on the centre of a rotating table with his arms outstretched. The table is rotating freely with an angular his hands towards his chest. The moment of inertia reduces to (3)/(5) time the original moment of inertia. Calculate angular speed of the man when he withdraws his hands.

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