A ballet dancer, dancing on a smooth floor is spinning about a vertical axis with her arms folded with an angular velocity of . When she stretches her arms fully, the spinning speed decrease in . If is the initial moment of inertia of the dancer, the new moment of inertia is |
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a) |
b) |
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d) |

A ballet dancer, dancing on a smooth floor is spinning about a vertical axis with her arms folded with an angular velocity of . When she stretches her arms fully, the spinning speed decrease in . If is the initial moment of inertia of the dancer, the new moment of inertia is |
||||||||

a) |
b) |
c) |
d) |

1 Answer

127 votes

**(a)**

Angular momentum of system remains constant

127 votes

127