Solve Prob. 8-77 if the bar has a circular cross section of 30-mm diameter.
Problem 77:
A bar having a square cross section of 30 mm by 30 mm is 2 m long and is held upward. If it has a mass of 5 kg>m, determine the largest angle θ, measured from the vertical, at which it can be supported before it is subjected to a tensile stress along its axis near the grip.
