# A merry-go-round is a common piece of playground equipment. A 3.0-m-diameter merry-go-round, which can be modeled as a disk with a mass of 210 kg , is spinning at 17 rpm. John runs tangent to the merry-go-round at 5.2 m/s, in the same direction that it is turning, and jumps onto the outer edge. John's mass is 30 kg.What is the merry-go-round's angular velocity, in rpm, after John jumps on?

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A merry-go-round is a common piece of playground equipment. A 3.0-m-diameter merry-go-round, which can be modeled as a disk with a mass of 210 kg , is spinning at 17 rpm. John runs tangent to the merry-go-round at 5.2 m/s, in the same direction that it is turning, and jumps onto the outer edge. John's mass is 30 kg.

What is the merry-go-round's angular velocity, in rpm, after John jumps on?

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Write an expression for conserva...

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