3. An Aluminum specimen with a rectangular section of \( 10 \mathrm{X} 12.7 \mathrm{~mm} \) was elastically deformed under a tensile load of \( 35500 \mathrm{~N} \). Calculate the resulting Unit deformation? \( E=69 \mathrm{GPa}=69 \times 10^{9} \mathrm{~N} / \mathrm{mm}^{2} \)

Solution