I am trying to find the forces in KJ, CJ, and CD.
The Attempt at a Solution
I found the magnitude of KJ to be 26.8kN, which is correct (according to answers in the back of the book). I believe it is a compressive force. The book lists all 3 forces as tension.
If all 3 members were under tension, there would have to be a reactionary horizontal force external to these three members acting on the right side of the truss to maintain equilibrium. Because there is no reactionary force with a horizontal component on the right side, the three members cannot all be experiencing tension. Therefore, the book has a typo and either one or two of the members are experiencing a compressive force.
Is this logic correct?
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