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Physics hw help needed badly

  1. Jan 26, 2009 #1
    1. The problem statement, all variables and given/known data

    A 1300 kg car rounds a curve of radius 70 m banked at an angle of 12°. If the car is traveling at 90 km/h, will a friction force be required?

    2. Relevant equations
    i need help with work


    3. The attempt at a solution
     
  2. jcsd
  3. Jan 26, 2009 #2
    start by drawing a free body diagram of the car on the bank, including the force of friction.

    [Edit]- Keep in mind that a=v^2/r which will come in handy for this problem. Also remember that your velocity is in km/h
     
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