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Physics

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A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 240 kg and a radius of 1.4 m. A 33- kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.20rpm. If the child then walks along a radius to the outer edge of the disk, how fast will the disk be turning? (answer must be in rpm)

  • Physics - ,

    http://www.jiskha.com/display.cgi?id=1258578369

  • Physics - ,

    i tried the technique that was posted on there, but the answer was wrong. and my answer is supposed to be in RPM.

  • Physics - ,

    can somebody explain how to do this problem without changing it to radians? the final answer has to be in rates per minute

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