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A playground merry-go-round of radius R = 2.6 m has a moment of inertia of I...

A playground merry-go-round of radius R = 2.6 m has a moment of inertia of I = 200 kg*m^2. and is rotating at a rate of ω = 11 rev/min around a frictionless vertical axis. Facing the axle, a 39 kg child hops onto the merry-go-round and manages to sit down on the edge. What is the new angular speed of the merry-go-round (in rev/min)

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