The length of the vertical pull rod is h and the cross section is a circle with a radius of r = r(x). The density of the rod is p. The shape of the rod is such that the normal stress along the entire length of the rod is constant o when the self-weight of the rod is taken into account. A point force acts at the lower end of the rod: G = A where A. is the area of the cross section of the rod at the lower end (origin) of the rod. 4A0 pgx rx e 200 Determine the symbolic expression for the rod's self-weight. P D Go D-D Ao r(x) h