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Homework Help: Maximum Accelleration Up Hill?

  1. Mar 15, 2010 #1
    1. The problem statement, all variables and given/known data

    cross-country skier is going up a slope at angle 5º to the horizontal. She is skating so only her skis provide the propulsion (i.e. she does not push with her ski poles). The static and kinetic friction coefficients for this situation are μs = 0.12, μk = 0.07 respectively.

    what is the maximum accelleration she can obtain?

    2. Relevant equations


    3. The attempt at a solution

    so far i have got to (0.17-0.02)*9.8 *cos85=a

    which equates to 1.4m/s^2 is this correct?

    I got it by dividing the 9.8*cos85 and the mass (which cancelled out).

    Juswanted to know if its right as i dont have the answer and been working on it for a while.
  2. jcsd
  3. Mar 15, 2010 #2


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    What about her weight component (the gravity force)?
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