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Homework Help: Friction Problem

  1. Oct 26, 2005 #1
    A 3.5 kg box is pushed along a horizontal floor by a force F of magnitude 15N at an angle of 40degrees below the horizontal. The coefficient of kinetic friction is 0.25. Calculate the magnitude of the frictional force on the block from the floor and the acceleration of the block.

    I dont really know where to start.

    Can anyone Help?
  2. jcsd
  3. Oct 26, 2005 #2


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    The sum of all the forces acting on the block equals the mass of the block times acceleration. You just need to account for all the forces properly.
  4. Oct 26, 2005 #3


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    Start exacty where you start with all problems of this nature. With a free body diagram. Draw your forces and the components. Sum the componts and procede.

    Show us your work.
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