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Homework Help: Static Coefficient of Friction

  1. Oct 5, 2006 #1
    hey guys i am really stuck i need to find the derivation for the coefficient of friction between metal and wood, there are no numerical values to calculate i just need to figure out out the heck you derivate this!

    mu = (1/cos theta)*[(W/mg)- sin theta]

    It is a system where the wooden block is on an inclined plane and Tension is provided by weight in pan which pulls using its own mg through a pulley system W = Mg of weights in the pan.
  2. jcsd
  3. Oct 5, 2006 #2


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    I would begin by drawing a freebody diagram.
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