ARC-138 Final Exam

1. What force must be applied to a steel bar 1 in. square and 2 ft. long to produce an elongation of 0.016 in? (The modulus of elasticity for steel is 29,000,000 psi)
2. What axial compressive load may be placed on a short timber post whose cross-sectional dimensions are 9.5 x 9.5 in. if the allowable if unit compressive stress is 1100 psi?
3. Determine the minimum cross-sectional area of steel bar required to support a tensile force of 50 kips is the allowable unit tensile stress is 20 ksi.