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Homework Help: Truss analysis problem.

  1. Oct 20, 2013 #1
    1. The problem statement, all variables and given/known data

    As shown by the attachment we are given the distances and the 28kN force

    2. Relevant equations

    Relevent equations are equations of equilibrium;

    ƩFy & ƩFx = 0;
    ƩM = 0;

    3. The attempt at a solution

    First found By by summing the moments around point A;
    (clockwise positive)

    ƩMa = (28*0.6) - (By*0.3) = 0

    which gave By = 56kN

    Next I summed the forces in the x direction and then took the sum of moments around the point "C", then tried to solve the simultaneous equations for Bx

    However, this gave the wrong answer and I have no idea where to go.

    Any help is great, thanks :D

    Attached Files:

  2. jcsd
  3. Oct 21, 2013 #2

    Andrew Mason

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    Science Advisor
    Homework Helper

    What is the moment about A of the force applied at C by the CB support? What does that tell you about the x component of force at C and at B?

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