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Homework Help: Force Couple

  1. Apr 27, 2007 #1
    1. The problem statement, all variables and given/known data

    http://img407.imageshack.us/img407/5642/resumestuff004bm5.jpg [Broken]

    A 135 N vertical force P is applied to A to the bracket shown, which is held by screws at B and C. (a) Replace P with an equivalent force couple system at B. (b) Find the two horizontal forces at B and C that are equivalent to the couple obtained in part a.

    2. Relevant equations

    3. The attempt at a solution

    Well, I tried to find the moment of force P about the hinge and then match that moment with an opposite one by a force at point B...but I really don't know what I'm doing.
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Apr 27, 2007 #2


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    We'd like to help but your diagram is unviewable.
  4. Apr 27, 2007 #3


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    I think the sketch shows a 125 mm outstanding leg length, with the other leg attached with 2 screws 75 mm apart. So what did you get for the moment of Force P about point B? What must be the horizontal force magnitude and direction at point C to balance that moment? And what must be the magnitude and direction of the horizonntal force at point B?
  5. Sep 30, 2007 #4
    hey guys same question, except the vertical force at p is 300N

    the distance from A to the block is 180mm, B to horizontal piece of bracket is 72 mm, and 108 mm from b to c.


    just read we should show our work, for a i got 54N*m, from 300*0.180m, but im not sure if this is correct
    for part b, i just divided the answers by the respective distances and got 750n and 500n
    Last edited: Sep 30, 2007
  6. Sep 30, 2007 #5
    is it possible that both B and C could have the same force of 500N?
  7. Sep 30, 2007 #6
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