A truss is given in Figure 2. The cross-sectional area of each member is 1800 mm and Young's modulus, E, for the material of the members is 200 GN/m. (i) (ii) (iii) 4m Determine the forces in each truss member due to the applied loads; (8) Calculate the vertical movement of the joint B in the truss; (8) Calculate the horizontal movement of the support D in the truss. (4) Such that: A 4m- E 40 KN B 4m- Figure 2 The total complementary energy of the system is given by: c = dF C and = i=k r=N -Fi - i=1 r=1 AR= F FiLi AEi i=k where all the symbols have their usual meanings. C 100 KN FiLi O Fi E A OPR 4m- D