A 24 in long bar with a cross sectional area of 1.0 in^2 is subjected to an axial tensile load of 10,000 lb. compute the stress, strain and the total elongation if the bar material is :
a) steel with E = 30,000,000 psi
b) aluminum with E = 10,000,000 psi
C) Titanuim with E = 16,500,000 psi