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4. A merry-go-round of radius R = 2.0 m has a moment of inertia /= 250 kg-m, and is rotating at 10 rpm (revolutions

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4. A merry-go-round of radius R = 2.0 m has a moment of inertia /= 250 kg-m, and is rotating at 10 rpm (revolutions per minute). A child whose mass is 25 kg jumps onto the merry-go-round halfway to the center and moves with a speed of 6.0 m/s. What is the new angular speed (in rpm) of the merry-go-round?

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