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Q: For perfect truss member is
  • A. m= 2j–r
  • B. m <2j–r
  • C. m >2j–r
  • D. m= 2j
Correct Answer: Option A - m = member j = number of joint r = number of reaction A perfect truss member it when m = 2j–r
A. m = member j = number of joint r = number of reaction A perfect truss member it when m = 2j–r

Explanations:

m = member j = number of joint r = number of reaction A perfect truss member it when m = 2j–r