(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A pin-jointed frame (diagram attached) is formed of steel rods of 10mm diameter with member AC being 2m long. If a load of 50kN is applied at A as shown, determine the deflection of A and the force in the three rods. Take E = 200kN/mm^2.

2. Relevant equations

F_{A→B}= F_{A→D}= F_{A→C}* cos(30)^2

F_{A→C}+2*F_{A→B}cos(30) = 50kN

3. The attempt at a solution

Our tutor has given the answers as:

F_{A→C}= 21.7kN

F_{A→B}=F_{A→D}=16.6kN

And he has said F_{A→C}= 50kN/1+2cos(30)^3)

But when I solve the equations infor F_{A→C}I actually get= 25.6kN. can anyone help me find my error?

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# Homework Help: Resolving forces using Compatibility of Displacements?

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