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Friction 65 degree hill

  1. Feb 16, 2009 #1
    1. The problem statement, all variables and given/known data
    Jeremy is trying to walk up an icy sidewalk. If he has leather shoes (coefficient of leather on ice = 0.3) then what is the steepest angle up which he can safely walk? What would have to be his coefficient of friction if the hill were 65 degrees?


    2. Relevant equations

    Ff = μ(Fn)
    F = ma (?)
    Fw = mg (?)

    3. The attempt at a solution

    No idea.
     
  2. jcsd
  3. Feb 16, 2009 #2
    If he is walking up the steepest angle, he will just be on the verge of slipping, draw a free body diagram.

    The second part is more of the same feast.
     
  4. Feb 16, 2009 #3
    Thanks! I got 16.7 degrees for steepest angle and 2.14 coefficient if 65 deg.
     
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