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Homework Help: Friction help

  1. Jan 12, 2008 #1
    This is my first time here, so if I put this in the wrong place I am sorry. I will place the entire problem here, exactly as it appears.

    The most massive car ever built was the official car of the General Secritary of the Communist Party in the former Soviet Union. Suppose this car is moving down a 10.0 degree slope when the driver suddenly applies the brakes. The net force acting on the car as it stops is -2.00 X 10^4 N. If the coefficient of kinetic friction between the car's tires and the pavement is 0.797, what is the car's mass? What is themagnitude of the normal force that the pavement exerts on the car?

    I have no clue as to what equations to use. Sorry.

    I made a free-body diagram, but I think I messed it up.

    Thank you for your time.
    Last edited: Jan 12, 2008
  2. jcsd
  3. Jan 12, 2008 #2


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    Can you explain all of the forces that are present on your diagram? What's Newton's second law?
  4. Jan 12, 2008 #3
    Just asking someone who knows, couldn't you find the mass by doing F/g = mass?
  5. Jan 12, 2008 #4
    You could. Thank you SO much for that comment. Apparently, I'm brain-dead, lol.
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