1
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Question

# For the plane truss shown in the figure, the number of zero force members for given loading is

A
4
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B
11
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C
13
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D
8
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Solution

## The correct option is D 8Zero force member 1. If only two non-collinear member exist at a joint and no external force/reaction acts at the joint the members must be zero force member 2. If 3 members are joined at a point and two of them are collinear and also no external load acts at the joint the third member will be zero force member where -o- = Zero force member On the logic given above Zero force members are DN→ hence NC, BO hence OC → hence CR EM, HJ, hence GJ ⇒ Total no of zero force member = 8

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