Sections $2\mathrm{.}7-2\mathrm{.}8$:

Problem $2-1$: The pole is held in place by three

cables. If the force of each cable acting on the

pole is shown, determine the position $(x,0,z)$ for

fixing cable $DA$ so that the resultant force exerted

on the pole is directed along its axis, from $D$

towards $O.$

$($Ans: $x=2\mathrm{.}34m,z=1\mathrm{.}96m$