A runner of mass m 39 kg and running at 3.1 ms runs as, Ask an Expert

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A runner of mass m = 39 kg and running at 3.1 m/s runs as shown and jumps on the rim of a playground merry-go-round which has a moment of inertia of 371 kg·m2 and a radius of 2 meters. Assuming the merry-go-round is initially at rest, what is its final angular velocity to three decimal places?

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