If the angular velocity of a body rotating about an axis is doubled...

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If the angular velocity of a body rotating about an axis is doubled and its moment of
\( \mathrm{P} \) inertia halved, the rotational kinetic energy
\( \mathrm{W} \) will changed by a factor of :-
(1) 4
(2) 2
(3) 1
(4) \( 1 / 2 \)
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