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Finding coefficient of friction given slope

  1. Sep 19, 2010 #1
    1. The problem statement, all variables and given/known data

    A skier coasts down a 3.5 degree slope at a constant speed. Find the coefficient of kinetic friction between the skis and the snow covering the slope.


    2. Relevant equations

    coefficient of friction x Normal force = force friction

    therefore: coefficeint of friction = force friction / normal force

    3. The attempt at a solution

    I'm totally stuck. I drew the Free Body Diagram, but i have no idea where to go from there.
     
  2. jcsd
  3. Sep 19, 2010 #2

    rock.freak667

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    Homework Helper

    Well what is the force parallel to the slope and what is the force normal to the slope?
     
  4. Sep 19, 2010 #3
    i wasnt given any of that information, the only other thing i know is that Fn=-Fg, since there is no accel, so the Ffr= (9.81)μm... but where do i go from there?
     
  5. Sep 19, 2010 #4

    rock.freak667

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    You need to split the weight into two components, one parallel to the slope and one normal to it.

    The one normal to it will be your normal force which will give you the frictional force.
     
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