(Solved): The outstretched hands and arms of a figure skater preparing for a spin can b ...

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The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center (Figure 1). When his hands and arms are brought in and If his original angular speed is \( 0.30 \mathrm{rev} / \mathrm{s} \), what is his final angular speed? wrapped around his body to execute the spin, the hands and arms can Express your answer in revolutions per second. be considered a thin-walled hollow cylinder. His hands and arms have a combined mass \( 9.0 \mathrm{~kg} \). When outstretched, they span \( 1.7 \mathrm{~m} \); when wrapped, they form a thin-walled hollow cylinder of radius \( 24 \mathrm{~cm} \). The moment of inertia about the rotation axis of the remainder of his body is constant and equal to \( 0.4 \mathrm{~kg} \cdot \mathrm{m}^{2} \). For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Anyone can be a ballerina.