​ARC 138 Final Exam

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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.
 
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