(Solved): Q13 The pin-jointed frame shown below is constructed from steel with an elastic constant, \( E \), ...

Q13 The pin-jointed frame shown below is constructed from steel with an elastic constant, \( E \), of \( 200 \mathrm{kN} / \mathrm{mm}^{2} \). The frame members \( a b, a c \) and \( a d \) have cross-sectional areas of \( 100 \mathrm{~mm}^{2}, 180 \mathrm{~mm}^{2} \) and \( 100 \mathrm{~mm}^{2} \), respectively. Determine the forces in the truss members.