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A bead in circular motion in space!

  1. Nov 30, 2005 #1
    Consider a bead of mass m that is free to move on a thin, circular wire of radius r. The bead is given an initial speed v0 and there is a coefficient of kinetic friction us. The experiment is performed in a spacecraft drifting in space. Find the speed of the bead at any subsequent time t.

    I did the following:

    fk= m*a= m * dv/dt

    v(t)= v0 - m * dv/dt

    But I bet that is not the answer..... Could somebody please help?
  2. jcsd
  3. Nov 30, 2005 #2


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    What is the Normal reaction on the bead? From that can you find the frictional force?
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