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A merry-go-round is at rest before a child pushes it so that it rotates with a constant angular acceleration for 38.0 s. When the child stops pushing, the merry-go-round is rotating at 1.20 rad/s. How many revolutions did the child make around the merry-go-round while he was pushing it?

  • Physics -

    change velocity= 1.20r/s
    during time=38sec

    angular acceleration= 1.20/38

    displacement= 1/2 angacceleration*time
    displacement will be in radians. Divide that by 2PI to get revolutions.

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