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So i did this question and got an answer of 43 N i was wondering if

  1. Apr 16, 2008 #1
    So i did this question and got an answer of 43 N i was wondering if someone else could try it and tell me what they get.. it its not the same ill explain my steps and see where i went wrong.

    1. The problem statement, all variables and given/known data
    A box with a mass of 22 kg is at rest on a ramp inclined at 45 to the horizontal. The coefficients of friction between the box and the ramp are Us = 0.78 and Uk = 0.65.
    Determine the magnitude of the smallest force that can be applied onto the top of the box, perpendicular to the ramp, if the box is to remain at rest.


    2. Relevant equations
    Fnet = 0
    Ff = UFn

    3. The attempt at a solution
    I broke the question down into its x and y components.
     
  2. jcsd
  3. Apr 16, 2008 #2
    Yes, that's what I get as well.
     
  4. Apr 16, 2008 #3
    okay good! thank you!!
     
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