Question a 50-m-diameter merry-go-round is initially, Ask an Expert

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Question: A 5.0-m-diameter merry-go-round is initially turning with a 4.0 s period. It slows down and stops in 20 s. Before slowing, what is the speed of a child on the rim (in m/s)? How many revolutions does the merry go round make as it stops (in rev)?

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