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Homework Help: Question about uniforn circular motion and highway curves

  1. Oct 28, 2007 #1
    1. The problem statement, all variables and given/known data
    What is the maximum speed with which a 1050-kg car can round a turn of radius 77m on a flat road if the coefficient of static friction between tires and the road is .80?

    2. Relevant equations
    F = mv^2 / r
    a = v2 / r
    Ffr = mustatic x mg

    3. The attempt at a solution

    I found the force of friction to be 8232 N: .80 x 1050 x 9.8 = 8232 N
    If someone could just tell me the next step that would help me out a lot; i don't know where to go from here. Thanks.
  2. jcsd
  3. Oct 28, 2007 #2


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    Staff Emeritus
    Science Advisor
    Gold Member

    Well that is the max force you can use before static friction gives upand the car slides. Therefore that is the max force you can use to turn the corner. All you need to do is solve for speed.
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