Problems 3 (20 points): For the plane truss structures shown in Figure give (a) the transformed element matrices, (b) the assembled element matrices, and (c) the condensed matrix equations for the unknown displacements and forces. (d) clearly list all boundary conditions (d) solution for nodal displacement and reaction forces A=A, 20x10 mm² 6.928 m- A, 15x10 mm 30 A₁ =18x10 mm² 10.928 m For all members: E-200 GPa, 40 P=500 kN 45

Fig: 1