A specimen of steel has a rectangular cross section 20 mm wide and 40 mm thick, a shear modulus of 207 GPa, and a Poisson’s ratio of 0.30. If this specimen is pulled in tension with a force of 60,000 N, what is the change in width if deformation is totally elastic?
(A) Increase in width of 3.62 × 10–6 m
(B) Decrease in width of 7.24 × 10–6 m
(C) Increase in width of 7.24 × 10–6 m
(D) Decrease in width of 2.18 × 10–6 m
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