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Homework Help: Physics skier help please

  1. Oct 11, 2006 #1
    A 67.9kg skier coasts up a snow-covered hill that makes an angle of 27.7o with the horizontal. The initial speed of the skier is 8.54m/s. After coasting a distance of 1.94m up the slope, the speed of the skier is 3.15m/s. Calculate the work done by the kinetic frictional force that acts on the skis.

    This is a problem that I seem to keep getting wrong. I have spent over an hour on it now....

    so far I have come up with that i will find my initial and final KE by .5mv^2

    How do I incorporate the conservational equation into this?

    My mind is jumbled

    Thanks.
     
  2. jcsd
  3. Oct 12, 2006 #2

    Chi Meson

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    change in KE = (-) change in PE + Q. (Q is heat generated through work done by friction)
     
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