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A playground merry-go-round of radius R = 1.92m has a moment of inertia of I = 233kgm^2 and is rotating at 10.5rev/min about a frictionless vertical axle. Facing the axle, a 22.4kg child hops onto the merry-go-round and manages to sit down on its edge. What is the new angular speed (in revolutions per minute) of the merry-go-round? Do not enter units. How much work was done by the child?

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