Q6 (a). Find the tensile force required to close the 6 mm gap for the system as shown in Figure 6a. L 6 mm P E, A1 Ez, Az Figure 6a The material and sectional properties of the two bars are as follows: E1 = 100,000 MPa, E2 = 150,000 MPa, L = 2 m, L = 4m, A = 300 mm and A = 200 mm.