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4. Yuma is spinning on the ice at 40 rad/s about his longitudinal axis when he abducts his arms and changes his radius of gyration

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4. Yuma is spinning on the ice at 40 rad/s about his longitudinal axis when he abducts his arms and changes his radius of gyration from 40 cm to 70 cm. If his angular momentum is conserved, what is his new angular velocity after he increases his radius of gyration? (10 points)

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