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How do you find the acceleration? How do you find the coefficient of friction?

  1. Oct 11, 2011 #1
    A 10.2 kg block is being pulled at constant speed in the positive x-direction along a flat surface with which it has a coefficient of kinetic friction. It is pulled by a rope at an angle of 30° above the horizontal, and the tension in that rope is 50 N. Normal force is 75 N.
     
  2. jcsd
  3. Oct 11, 2011 #2
    You find the acceleration by realizing that if it is being pulled at a constant speed, that there is none. If there is no acceleration, there must be no net force, which means that kinetic friction must be equal to the applied force.

    Remember that the tension is just equal to the applied force. A force of 50N applied at 30 degrees. Break it into components, find every component of every force on the block.
     
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