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Homework Help: Uniform Circular Motion with friction

  1. Nov 8, 2005 #1
    A car drives around a horizontal curve with a frictional coefficient of 0.58. What is the maximum safe speed for the carif the radius of the turn is 125m?

    r= 125m
    uk= 0.58

    ok I set up the problem as

    m (v2/r)=ukFn-(m)(g)

    so the masses would cancel, but I'm stuck and nopt sure if I set it up right.

    If you anyone could give me a little help it would be appreciated.
  2. jcsd
  3. Nov 8, 2005 #2
    You are making the equation too complex. Think about what force(s) are keeping the car in the circle and write another equation.
  4. Nov 8, 2005 #3

    Doc Al

    User Avatar

    Staff: Mentor

    The force of gravity acts downward, not centripetally.
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