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Homework Help: Frictional force on the car

  1. Apr 5, 2005 #1
    A stationary car of weight W on a road sloping at 30 degrees to the horizontal. The frictional force on the car is 4000 N acting up the road BC.


    What is
    (a) the weight W
    (b) the normal contact force R of the road surface on the car?
  2. jcsd
  3. Apr 5, 2005 #2
    What exactly are you stuck on? You're gonna need to show evidence of having done stuff, as people aren't gonna do your homework for you!
  4. Apr 5, 2005 #3
    Well...the first part. I can't get the vector diagram right. Where do I put 4000 N to start with?
  5. Apr 5, 2005 #4


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    Science Advisor

    Draw your picture with the road sloping down to the right, say. Then the frictional force points back up the road, up and to the left.
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