Statics - Truss Method of Joints example 1

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Hi, I think Ax did come out to be a positive number for the beginning whole truss’ FBD where the sum in the x forces were (500-Ax=0). In this case we wouldn’t have needed to switch the direction of Ax. 

I haven’t finished the video, maybe this doesn’t affect the calculations but I wanted to mention it just in case.

laurenpadron