1. The problem statement, all variables and given/known data 2. Relevant equations Equation of Equilibrium (Horizontal and Vertical Forces, Moments) Normal Stress = F/A 3. The attempt at a solution I have already solved the solution for this problem. For part (a), I simply found the force in the link, and used the cross area where the pin was, since I assumed that was where the largest normal force would be. It turned out the the link was in tension. However when I tried part (b), I got the wrong answer, and later found out it was because the cross-sectional area changed due the fact that in this case, the link was under compression. The cross-sectional area ended up being the middle of the link (not where the pin was). Why is this so? I cannot find where the book mentions this, and I cannot find any information on it with google.