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A man stands on a rotating platform with his arms stretched holding a 5 kg...

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A man stands on a rotating platform with his arms stretched holding a 5 kg weight in each hand The angular speed of the platform is 1 2 rev s The moment of inertia of the man together with the platform may be taken to be constant and equal to 6 kg m If the man brings his arms close to his chest with the distance of each weight from the axis changing from 100 cm to 20 cm The new angular speed of the platform is 1 2 rev s 2 3 rev s

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