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Banked Car! Please help . Due at 11 and I can't figure it out

  1. Jun 15, 2011 #1
    1. The problem statement, all variables and given/known data

    1) Suppose the friction force is sufficient to keep the car from skidding. Calculate the magnitude of the normal force exerted on the car by the road's surface

    2) Calc the magnitude of Friction Force

    3) What's the lowest possible value of the static friction coefficient?

    2. Relevant equations

    The diagram looks like this, but with different numbers
    http://img523.imageshack.us/img523/4331/bankrz7.jpg [Broken]

    velocity = 22 m/s
    radius = 23 m
    mass = 2400 kg
    Degree incline = 35

    Net centripetal force = 50,504,35 N

    3. The attempt at a solution

    1) I broke it up into components but have no idea how to solve and get N.

    Fx = Nsin(theta) + Fr cos (theta) (Fr = force of Friction)
    Fy = Ncos (theta) - Frsin (Theta)


    2) I need 1 to solve for this, but I was just going to plug back into one of the above equations and solve

    3) Fr = muN
    But I need N from 1 and Fr from 2



    Help is much appreciated! It's due at 11 and I've trying all day. THANK YOU
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
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