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Simple friction problem

  1. Mar 20, 2008 #1
    1. The problem statement, all variables and given/known data
    A bobsled (600kg) enters a straightaway at 19.2 m/s and travels 200m. If the coefficient of kinetic friction is .15, what is the velocity at the end of the straightaway?


    2. Relevant equations
    My friend asked me for help on this problem, but its been a while since ive taken physics. Can anyone point me to an equation that might help get us started?


    3. The attempt at a solution
    I know the force of kinetic friction will be 5880*.15= 882 and that vf^2 - vi^2 = 2a(x) is probably the equation to use, im just lost on how to turn that kinetic friction into acceleration so I can use it.
     
  2. jcsd
  3. Mar 20, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Use Newton's 2nd law.
     
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