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3. A 2 square steel bar is 20 ft long and carries a tension force of 16,000 lbs. How much does the bar elongate if

3. A 2" square steel bar is 20 ft long and carries a tension force of 16,000 lbs. How much does the bar elongate if the modulus of elasticity is 29,000 ksi? What is its average unit strain

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