Theory of Structures - Engineering

Q1:

A truss containing j joints and m members, will be a simple truss if

A m = 2j - 3

B j = 2m - 3

C m = 3j - 2

D j = 3m - 2

ANS:A - m = 2j - 3

I = (r+m)-2j.

Simple truss indeterminacy = 0.
0 = 3+m-2j.
m = 2j-3. (1)