The assembly consists of two 10 mm diameter red brass C83400 coper rods AB and CD, a 15 mm diameter 304 stainless steel of EF and a rigid bar G. (Elasticity moduli of brass Eb = 101 GPa, stainless steel Es = 193 GPa) a) If the force P is 3 kN, determine the stretch of rod EF. b) If the stretch of whole assembly (from A to F) is 0.45 mm, determine the force P.
