A square bar with 1-inch-long sides is being pulled in tension. Assume the bar is made of steel with an E = 29,000 ksi, is 6 ft long, and the tension load is 40,000 lbs. What is the elongation of the bar?
a) 99.31 inches
b) 198.62 inches
c) 49.66 inches
d) 24.83 inches