Ex3: The three A-36 steel (E-200 GPa) bars are pin connected to a rigid member. If the applied load on the member is 15 kN, determine the force developed in each bar. Bars AB and EF each have a cross sectional area of 50 mm², and bar CD has a cross- sectional area of 30 mm². D -0.4 m- 0.2 m 0.2 m 15 kN FC -0.4 m- 0.2 m 0.2 m 15 kN (b) 0.5 m 5