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Friction - truck on a slippery road

  1. Apr 9, 2010 #1
    1. The problem statement, all variables and given/known data
    A truck is traveling at 40 m/s on a slippery road. The driver slams on the brakes and the truck starts to skid. If the coefficient of kinetic friction between the tires and the road is 0.30, how far will the truck skid before stopping?


    2. Relevant equations

    ma=-ug
    V^2 = Vintial +2at
    x = (v^2 + Vintial^2)/2a

    3. The attempt at a solution
    would it be 40^2 divided by .6(9.8m/s)
     
  2. jcsd
  3. Apr 9, 2010 #2
    Re: friction/displacement

    Use F=ma in the x-direction to get the acceleration, and then your third equation gets you all the way home.
     
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