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Homework Help: Forces and Newton's Laws of motion

  1. Oct 15, 2011 #1
    What is the magnitude of the force F (assumed horizontal) required to push the block up the plane at a constant speed? Take the coefficient of kinetic friction to be 0.25. Block is 75 lb

    I used Ff= mewN and found Wparallel

    Did Ʃ=ma
    Fapp-Ff-Wparallel= ma

    but i keep getting wrong answer
     
  2. jcsd
  3. Oct 15, 2011 #2

    PhanthomJay

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    What is the angle of the incline?
    Show your calculations for these terms
    You need first to calculate the parallel , and perpendicular to the incline, components of F app before solving by using Newton's laws in both dirctions.
     
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