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Homework Help: Need help with Frictional Force

  1. Apr 27, 2010 #1
    1. The problem statement, all variables and given/known data
    A car weighing 1.07 104 N is at rest on a 32.5° incline. Each wheel bears an equal part of the car's weight. Thus the axles apply a vertical downward force of 2.68 103 N to the center of each wheel. The tire radius is 35 cm and the brake radius is 20sm
    (a) Find the frictional force exerted by the road on each wheel.

    (b) Find the sum of the magnitudes of the frictional forces fB applied by the brakes to the wheel, as shown in the figure below.

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Apr 27, 2010 #2
    what is 20sm?
  4. Apr 27, 2010 #3
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