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Wedge Problem

  1. Nov 22, 2009 #1
    1. The problem statement, all variables and given/known data

    Determine the force P required to like the 200kg crate. Coeff. Static friciton is 0.3 on ALL contact of surfaces. Neglect Wedge Mass

    Prob.8-66.jpg

    2. Relevant equations

    μS x Fn = Fk
    Summation of forces eqns

    3. The attempt at a solution

    im getting more unknowns than equations
    see attachment.
     

    Attached Files:

  2. jcsd
  3. Nov 22, 2009 #2

    Delphi51

    User Avatar
    Homework Helper

    You should be able to get the friction force due to the B wedge moving on the crate surface quite easily. Do that first!
    For the next surface down, can you find the normal force? Both the weight of the crate and the P force contribute to it.
     
  4. Nov 23, 2009 #3
    haha ofund it actually. muFN = Fk so uu only have 2 variables. gah well thanks anyways
     
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