고체역학 (Beer) — Stress and Strain—Axial Loading: Problem 2.129

2.129 Each of the four vertical links connecting the two rigid horizontal members is made of aluminum (\(E = 70 \text{ GPa}\)) and has a uniform rectangular cross section of \(10 \times 40 \text{ mm}\). For the loading shown, determine the deflection of (a) point \(E\), (b) point \(F\), (c) point \(G\).