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Homework Help: Coefficient of Static Friction Problem

  1. Dec 2, 2007 #1
    [SOLVED] Coefficient of Static Friction Problem

    1. The problem statement, all variables and given/known data
    A baseball player with mass m = 73 kg, sliding into second base, is retarded by a frictional force of magnitude 460 N. What is the coefficient of kinetic friction µk between the player and the ground?

    2. Relevant equations
    force of kinetic friction
    f(k)=[tex]\mu[/tex](k) N

    3. The attempt at a solution
    This is a homework question given by our teacher during finals week, however he failed to go over this subject this semester and I do not have any references in my notes. The book I am using (College Pysics, 2nd ed., Giambattista) goes over this subject but is very unclear on how to solve this type of problem. Any help will be appreciated, thanks!
  2. jcsd
  3. Dec 2, 2007 #2
    Frictional force = coefficient of friction * normal force
    Fn = mg = 73 * 9.8 = 715.4 N
    Ff = 460 N
    460 N = uk * 715.4 N

    uk = .64
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