An aluminum bar 125 mm (5.0 in.) long and having a square cross section 16.5 mm (0.65 in.) on an edge is pulled in tension with a load of 66,700 N (15,000 lbf) and experiences an elongation of 0.43 mm (1.7 × 10–2 in.). Assuming that the deformation is entirely elastic, calculate the modulus of elasticity of the aluminum.
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