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)
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)
Question ID - 52805 | SaraNextGen Top Answer
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)
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A ballet dancer, dancing on a smooth floor is spinning about a vertical axis with her arms folded with an angular velocity of |
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a) |
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b) |
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c) |
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d) |
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1 Answer
127 votes
Answer Key / Explanation : (a) -
(a)
Angular momentum of system remains constant
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Answer Link
127