Axial Members What is most nearly the elongation of the aluminum bar (cross section of 3 cm x 3 cm) shown when loaded to its yield point? The modulus of elasticity is 69 GPa, and the yield strength in tension is 255 MPa. Neglect the weight of the bar. A. 3.3 mm B. 9.3 mm C. 12 mm D. 15 mm T- L= 2.5 m