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A bead slides on a circular wire

  1. Jan 17, 2012 #1
    1. The problem statement, all variables and given/known data
    A bead slides on a smooth circular wire of radius b which lies in a vertical plane. The bead starts from rest at a point that is level with the center of the hoop.
    Find the time it takes for the bead to slide to the bottom of the hoop.

    The attempt at a solution
    at t=0
    U=mgb, KE=0

    at the bottom
    U=0, KE=mv2/2, v=(2bg)1/2
     
  2. jcsd
  3. Jan 18, 2012 #2
    What about the time?
     
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