고체역학 (Beer) — Stress and Strain—Axial Loading: Problem 2.44

2.44 The rigid bar $AD$ is supported by two steel wires of $1/16$-in. diameter ($E = 29 \times 10^6$ psi) and a pin and bracket at $A$. Knowing that the wires were initially taut, determine (a) the additional tension in each wire when a 220-lb load $P$ is applied at $D$, (b) the corresponding deflection of point $D$.