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Help on a problem

  1. Feb 8, 2004 #1
    A 15kg box is being pushed at an angle of 20 degrees with a force of 20 newtons. What is the force of friction?
  2. jcsd
  3. Feb 8, 2004 #2
    The force of the friction is oppsite to the applied force in the direction of relative motion and equal in magnitude if the box is not moving
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