Question

His hands and arms have a combined mass 7.0 kg . When outstretched, they span 1.6 m ; when wrapped, they form a thin-walled hollow cylinder of radius 25 cm . The moment of inertia about the rotation axis of the remainder of his body is constant and equal to 0.4 kg⋅m2

A.If his original angular speed is 0.40 rev/s , what is his final angular speed?

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