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Homework Help: Where do i begin?

  1. Feb 22, 2005 #1
    A 3.20g coin is placed 19.0cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the turntable surface of (u)static=0.900 and (u)kinetic=0.400.

    What is the maximum angular velocity with which the turntable can spin without the coin sliding?
  2. jcsd
  3. Feb 22, 2005 #2


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    Do you know the equation for centripetal force? You can see it increases with angular velocity, so at a certain point it will be greater than the force of friction, and the coin will begin to move.
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