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4. | If a person standing on a rotating disc stretches out his hands, the angular speed will? | |
A. | Increase | |
B. | Decrease | |
C. | Remains same | |
D. | Increases and then decreases | |
Answer: Option B | |
Explanation: | |
As the person stretches out his hands, his moment of inertia increases. To conserve angular momentum, his angular speed increases. |
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