A girl stands at the centre of a turntable with her two arms out stretched. The turntable…
Physics · NEET · NTA Exams — Rotational motion
A girl stands at the centre of a turntable with her two arms out stretched. The turntable is set rotating with an angular velocity of 30 rad/s. The girl folds her hand back reducing the moment of inertia to 40% of its value. The increase in kinetic energy of the girl is
- 10 times
- 5 times
- 2.5 times
- None of these
Answer
(C) 2.5 times
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