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Homework Help: Applying Newton's Laws; coefficient of kinetic force

  1. Feb 18, 2010 #1
    1. The problem statement, all variables and given/known data
    To move a large crate across a rough floor, you push on it with a force F at an angle of 21°, below the horizontal. Find the acceleration of the crate, given that the mass of the crate is m = 28 kg, the applied force is 322 N and the coefficient of kinetic friction between the crate and the floor is 0.50.



    2. Relevant equations
    a=g(sinθ-μkcosθ)

    μk=-a/g


    3. The attempt at a solution
    a=9.81(0.836655639-(.5)(-0.54772926)
    a=10.8942038m/s²
     
    Last edited: Feb 19, 2010
  2. jcsd
  3. Feb 18, 2010 #2

    PhanthomJay

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    Please list your relevant equations and attempt at a solution. Then someone will be glad to assist, once you show your work.
     
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