1
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Question

# Number of zero force members in the truss shown below is

A
8
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B
7
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C
6
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D
9
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Solution

## The correct option is B 7At joint F: No force acting at joint F, therefore, force in member EF and FM are zero. At joint M: P4 is in the same direction as of member EM, therefore, force in LM is zero. At joint K: Members JK and KL are in line with each other, therefore force in member KD is zero. At joint C: Member CD and CB are in line with each other, therefore force in member CJ is zero. At joint H: Member HG and HI are in line with each other, therefore, force in member HB is zero. At point A: Force P1 is in the same direction as of member AB, therefore, force in member AG is zero. ∴ Zero force members are EF, FM,LM, KD, CJ, HB and AG.

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