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Determining distance of travel with friction acting on a car.

  1. Nov 12, 2009 #1
    1. A car is traveling at 51 mi/h on a horizontal highway. If the coefficient of static friction between the road and tires on a rainy day is .102 what is the minimum distance in which the car will stop.



    2. f=un f=ma kinetics equations



    3. No idea here. Teacher barely skimmed over friction so far and all problems we have done in class either had a value of acceleration, a mass or a force. This one has none of those.
     
  2. jcsd
  3. Nov 12, 2009 #2
    can u imagine what will happen to the car?
     
  4. Nov 12, 2009 #3
    I know it will stop eventually but I don't know how far it will go. I made a free body diagram but it wasn't very useful without knowing the cars mass.
     
  5. Nov 14, 2009 #4
    In your free body diagram, do u have these 3 forces:

    the weight od the car, the normal force exerted by the ground, and the friction force? :)
     
  6. Nov 14, 2009 #5
    Alright I got it. It turns out that the masses cancel.
     
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