If each of the posts has an unloaded length of 1 m and a cross-sectional area of 650 mm2 , and the spring has a stiffness of k = 4 mn/m and an unstretched length of 1.02 m , determine the vertical dis

If each of the posts has an unloaded length of 1 m and a cross-sectional area of 650 mm2 , and the spring has a stiffness of k = 4 mn/m and an unstretched length of 1.02 m , determine the vertical displacement of a and b after the load is applied to the bar.