A spinning ice skater speeds up by pulling her hands to, Physics

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A spinning ice skater speeds up by pulling her hands to

A spinning ice skater speeds up by pulling her hands to theside of her body. Approximate the ice skater by a cylinder ofradius 10cm and mass 30kg. Her two hands are two point masses of0.25kg each and her (massless) arms extend 90cm from her torso. Ifinitially she was rotating at 2rev/s, what is her final angular velocity?

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