1.

A child is standing with folded hands at the centre of a4.platform rotatingthe system is K. The child now stretches his arms so that themoment of inertia of the system doubles. The kinetic energyof the system now is(a) 2K(b)K/2 (c) K/4 (d)4Kabout its central axis. The kinetic energy of(2004)

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