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Homework Help: Kinetic friction and distance problem.

  1. May 12, 2014 #1
    1. The problem statement, all variables and given/known data
    A car is traveling at a given velocity on a road with a coefficient of friction of 0.5 when it suddenly has to apply the brakes. Given that it travels 10 meters before coming to a stop what is the initial velocity of the car?

    2. Relevant equations
    Vi^2=Vf^2 + 2ax KE=1/2mv^2

    3. The attempt at a solution[/b
    I had some trouble with this since the mass isnt given, i supposed i had to figure out a way to relate two equations so that the mass could cancel but i had a hard time doing so. Can anybody help?
  2. jcsd
  3. May 12, 2014 #2
    Assume a mass of m, and then use F=MA. Consider the normal force and coefficient of friction.
  4. May 12, 2014 #3


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    Please post your working as far as you got.
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