Civil Engineering MCQAE Level Civil Engineering
In a plane truss, if at a joint three members meet, two of them are collinear, there are no external forces at the joint, and the third member makes an angle with the collinear pair, then:
Structural AnalysisZero Force MembersMEDIUM
Choose the correct answer
A
The two collinear members are zero-force members
B
The third member is a zero-force member
C
All three are zero-force members
D
Cannot be determined without analysis
Correct Answer
B. The third member is a zero-force member
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At an unloaded joint with 3 members where 2 are collinear, equilibrium perpendicular to the collinear direction requires the third non-collinear member to carry zero force.
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