If there are m unknown member forces, r unknown reaction components an – McqOptions

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1.	If there are m unknown member forces, r unknown reaction components and j number of joints, then the degree of static indeterminacy of a pin-jointed plane frame is given by
A.	m + r + 2j
B.	m – r + 2j
C.	m + r – 2j
D.	m + r – 3j
Answer» D. m + r – 3j

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If there are m unknown member forces, r unknown reaction components and j number of joints, then the degree of static indeterminacy of a pin-jointed plane frame is given by