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A playground merry-go-round has a mass of 120 kg and a radius of 1.80 m and...

A playground merry-go-round has a mass of 120 kg and a radius of 1.80 m and it is rotating with an angular velocity of 0.600 rev/s. What is its angular velocity (in rev/s) after a 28.0 kg child gets onto it by grabbing its outer edge? The child is initially at rest.

rev/s

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