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A 38.9 kg child is sitting on the edge of a 169.4 kg merry-go-round of radius 2.6 m while it is spinning at a rate of 2.535 rpm. If the child moves to the center, how fast will it be spinning? (Hint: use conservation of angular momentum)

rpm

A 37.7 kg child is sitting on the edge of a 175.4 kg merry-go-round of radius 2.47 m while it is spinning at a rate of 2.447 rpm. If the child moves to the center, how fast will it be spinning? (Hint: use conservation of angular momentum)

A 47.1 kg child is sitting on the edge of a 150.5 kg merry-go-round of radius 2.31 m while it is spinning at a rate of 3.444 rpm. If the child moves to the center, how fast will it be spinning? (Hint: use conservation of angular momentum)

A 44.5 kg child is sitting on the edge of a 108.5 kg merry-go-round of radius 2.99 m while it is spinning at a rate of 1.208 rpm. If the child moves to the center, how fast will it be spinning? (Hint: use conservation of angular momentum)

A 47.9 kg child is sitting on the edge of a 145.9 kg merry-go-round of radius 2.48 m while it is spinning at a rate of 1.146 rpm. If the child moves to the center, how fast will it be spinning? (Hint: use conservation of angular momentum)

A 42.6 kg child is sitting on the edge of a 199.6 kg merry-go-round of radius 2.46 m while it is spinning at a rate of 3.994 rpm. If the child moves to the center, how fast will it be spinning? (Hint: use conservation of angular momentum)