An aircraft hangar has a semi$-$circular shape with a height of $10$m$.$ There is a window at a height of $5\mathrm{.}6$m from the ground with an area of $2$m$2.$ During a storm, the wind blows directly across the hangar with a speed of $57$ m$/$s$.$ What is the force $($in Newtons$)$ on the window? $($Model the hangar as a doublet. The density$$of air is $1\mathrm{.}22$kgm$-3)($ANS: aprox $4972$N$)$