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(I) What is the condition of angular mom...

(I) What is the condition of angular momentum conservation?
(ii) A man sets on a sprining piano with his arms folded. If he extends his arms, what happens to his angular velocity?

Text Solution

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(i) If net torque applied on the body is zero. Then the angular momentum is conserved.
(ii) Angular velocity decreases as `I_(1)omega_(1) = I_(2)omega_(2)`.
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