For the plane truss shown in Fig. $3,$ determine both horizontal and vertical displacements a node $2.$ Also determine the stress in element $1.$ Use $E=10,000$ksi,$A=1i{n}^2$ for all elements.

Ans: $u_{2x}=0\mathrm{.}148in,u_{2y}=-0\mathrm{.}005in.$;$14\mathrm{.}4ks$