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Statement of a problem № 2591

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A man stands on a freely rotating platform, as shown in Fig. 10-9. With his arms extended, his rotation frequency is 0.25 rev/s. But when he draws them in, his frequency is 0.80 rev/s. Find the ratio of his moment of inertia in the first case to that in the second.

Solution:
A man stands on a freely rotating platform, as shown in Fig. 10-9. With his arms

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