Question

3. A person with heavy weight in his hands close to the chest is standing on a rotating
turn table. When he stretched his hands, his speed of rotation decreases. Explain
why?

Answer 1

• Example: When a person is rotating with hands stretched, so the moment of inertia will be more because distribution of mass is far from the axis of rotation. As the person brings his arms close to body, moment of inertia decreases because the mass is now distributed close to axis.

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Answer 2

Explanation:

When a person is rotating with hands stretched, so the moment of inertia will be more because distribution of mass is far from the axis of rotation. As the person brings his arms close to body, moment of inertia decreases because the mass is now distributed close to axis