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Moments of Force

  1. Sep 29, 2013 #1
    1.

    bcb2e14d67b70ed7b51d9eab837ab547.png

    How do I find the force of A and B. I am taking moments at A but I am not getting the correct answer. (More Details below of attempt)



    2. Relevant equations

    Ʃ Of Clockwise Moments = Ʃ Of Anti-Clockwise Moments
    Ʃ Of Upward Force = Ʃ Of Downward Force


    3. The attempt at a solution

    (THIS IS WRONG BUT THIS IS MY ATTEMPT)

    A => (3x2)+(5x5)+(12x2)= Bx11
    => 6 + 25 + 24 = B x 11
    => 55 = B x 11
    => 55/11 = B
    => 5 = b


    THANKS FOR HELP, I was trying this weekend and I need some genius advice so when I get this question again, I will be able to do so :)
     
  2. jcsd
  3. Sep 29, 2013 #2

    Doc Al

    User Avatar

    Staff: Mentor

    I assume you're using A as your pivot point.
    (1) You neglected the moment due to the 2kN force at the left end.
    (2) What's the distance between B and A?
     
  4. Sep 29, 2013 #3
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