2) A steel rod with a cross-sectional area of 0.25 sq. in. isstretched between two fixed points. The tensile load at 70 degreesF is 1200 lb. What will be the stress at 0 degrees F? At whattemperature will the stress be zero?
Assume ? = 6.5 x 10-6 °F-1 and E = 30 x106 psi.