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A boy stands over the centre of a horizo...

A boy stands over the centre of a horizontal platform which is rotating freely with a speed of `2 "revolutions"//s` about a vertical axis through the centre of the platform and straight up through the boy. He holds `2 kg` masses in each of his hands close to his body. The combined moment of inertia of the system is `1 kg xx metre^(2)`. The boy now stretches his arms so as to hold the masses far from his body. In this situation, the moment of inertia of the system increases to `2 kgxxmetre^(2)`, The kinetic energy of the system in the latter case as compared with that in the previous case will

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