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Angular speed prob

  1. Oct 23, 2005 #1
    A flat uniform circular disk (radius = 1.90 m, mass = 260 kg) is initially stationary. The disk is free to rotate in the horizontal plane about a frictionless axis perpendicular to the center of the disk. A 69.0-kg person, standing 1.97 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 3.10 m/s relative to the ground. Find the resulting angular speed (in rad/s) of the disk.

    dont understand
    please help
  2. jcsd
  3. Oct 23, 2005 #2
    Show me some work, and then ill help you. Or atleast convince yourself of the concept. I'd be happy to help, but i dont want to do it for you.
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