- #1
question dude
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Homework Statement
I want to find the force in the vertical purple member.
Assuming I know the forces in all the other members, there's a problem with working out the force in the purple member.
(Bear in mind, I'm using the method where I assume equilibrium at each joint in the structure, and then resolve the forces vertically and horizontally)
If I look at joint A and resolve all the forces horizontally and vertically, then I would find that the vertical purple member must have a force in reaction to the vertical component of the force carried by the diagonal member. But if I look at joint B, it would be found that the vertical purple member has zero force, which contradicts what was found in joint A. I'm stuck on this.