Two thin rectangular plates, one very smooth and one very rough, will be welded to each other in the below two configurations. Each plate has a length of $2m$ and a width of $1m.$ During service, each welded configuration will be exposed to steady winds of speed $5\frac{m}{s}$ that flow parallel on on side of the plates in the shown directions. The air density and viscosity can be taken as $1\mathrm{.}2k\frac{g}{m^3}$ and $1\mathrm{.}8{10}^{-5}Pa*s,$ respectively. Determine the drag force exerted by the wind on each configuration.

Configuration I

Configuration II