College Physics

A 2.0 m diameter merry-go-round is initially turning with a 4.2 s period. It slows and stops in 22.0 seconds. Before slowing, what is the speed (in m/s) of a child on the rim?

How many revolutions does the merry-go-round make as it stops?

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  1. one rev in 4.2 seconds
    v= 2PI*radius/4.2

    figure that out

    Now, average angular velocity= Vi/(2*r)

    revolutions= avgangularveloicty*22sec

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    bobpursley
  2. This is wrong

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