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Rotation: Angular Momentum

Problem #: 2 | Variant #: 3

A 44.8 kg child is sitting on the edge of a merry-go-round of radius 2.22 m while it is spinning at a rate of 0.6791 rpm. If the child moves to the center the merry-go-round will rotate at 1.1 rpm. What is the mass of the merry-go-round? (Hint: use conservation of angular momentum)

kg

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