1. A circular cylindrical rod with a diameter of 5 cm is tested in a uniaxial tension test as a candidate intramedullary nail. Before applying a tensile force of F = 1,000 N, two points A and B that are at a distance l0 = 12 cm (gage length) are marked on the ends of the nail. Once the force is applied, the distance between A and B is measured as l1 =13.25 cm. Determine the tensile strain and average tensile stress generated in the rod. 2. After testing the previous material, the manufacturers alert you, the materials engineer, that in order to manufacture efficiently there can be no curved cross sectional boundaries (I.e. you can't use a circle). Given that knowledge, you recommend a square cross sectional area for your new intramedullary nail design. Your supervisor prefers an equilateral triangle. Determine the dimensions of each cross sectional area shape (i.e. side length or base and height) for a new design that meets the design criteria of a minimum axial stiffness of 50,000 N/m and a length of 12 cm. Remember you are using the same material you characterized in problem 1. Comment on which design might be better at