At an unloaded joint of a pin-jointed truss, two non-collinear members meet and no external reaction acts. What is the usual conclusion?
Correct answer: C. Both members are zero-force members
- A. Both members carry equal tension
- B. One member carries the full joint load
- C. Both members are zero-force members
- D. Both members carry equal compression
Explanation
The joint has no external load, and the two member forces act in different directions. Equilibrium is possible only when both member forces are zero, making them zero-force members for that loading condition.
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