고체역학 (Beer) — Stress and Strain—Axial Loading: Problem 2.64

2.64 A 2.75-kN tensile load is applied to a test coupon made from 1.6-mm flat steel plate (\(E = 200 \text{ GPa}\), \(\nu = 0.30\)). Determine the resulting change in (a) the 50-mm gage length, (b) the width of portion \(AB\) of the test coupon, (c) the thickness of portion \(AB\), (d) the cross-sectional area of portion \(AB\).