(a) State the Saint-Venant's Principle (b) The assembly shown in Figure 1 consists of an aluminum tube AB having a cross-sectional area of 450mm. A steel rod having a diameter of 14mm is attached to a rigid collar and passes through the tube. If a tensile load of 100kN is applied to the rod, determine (i) the displacement of the end C of the rod with respect to end B. (ii) the displacement of the end B of the rod with respect to end A. (iii) the displacement of the end C of the rod with respect to end A. Take Est = 200GPa, E = 70GPa 500mm. 750mm -90KN 90KN Figure 1 90KN (b) - 90KN 90KN