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Question

In the plane truss shown below, how many members have zero force? 

          

A.
 3
B.
 5
C.
 7
D.
 
Answer ( Option C)

 7

Solution

· If only two non-collinear members meet at a joint and threre is no external load at that joint, then both members are zero force members.

· If three members meet at a joint, where two are collinear and one is non- collinear, and threee is no external load at that joint, then the non- collinear member is a zero force member.

 7 members carry zero force

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