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Homework Help: Finding acceleration of an object on a horizontal surface

  1. Oct 12, 2009 #1
    1. The problem statement, all variables and given/known data

    The coefficients of static and kinetic friction between a 59 kg box and a horizontal surface are 0.66 and 0.37, respectively.

    (a) What is the acceleration of the object if a 330 N horizontal force is applied to the box?

    (b) What is the acceleration if the applied force is 485 N

    2. Relevant equations

    F=ma, coefficent of friction equations

    3. The attempt at a solution

    I tried using the equations

    but I am not really sure how they are supposed to be used
  2. jcsd
  3. Oct 13, 2009 #2
    Is this applied to the box at rest? in that case the applied force has to be greater than the max Static Friction for the box to have any acceleration.
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