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Homework Help: Coefficient of Friction needed to move a car

  1. Oct 12, 2008 #1
    Hi, I am new here and I need help with a problem.

    1. The problem statement, all variables and given/known data

    Hopping in to your Porsche, you floor it and accelerate at 12 m/s/s without spinning the tires. Determine the minimum coefficient of static friction between the tires and the road needed to make this possible.

    2. Relevant equations

    Fs = µsN

    3. The attempt at a solution

    This is where I am stuck. The problem only gives me acceleration so I am unable to use the above equation to solve it. 12m = N -Fs?
  2. jcsd
  3. Oct 12, 2008 #2


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    Welcome to PF!

    Hi seaway115! Welcome to PF! :smile:

    Use good ol' Newton's second law … F = ma. :wink:
  4. Oct 12, 2008 #3
    At first glance, you might think that you do not have enough information. But if you do as tiny-tim said, you'll see soon enough how nice and easy this problem really is.
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