The dimensions $\backslash ($ R$=0\mathrm{.}5\backslash$mathrm$\{$ft$\}\backslash )$ and $\backslash ($ L$=2\backslash$mathrm$\{$ft$\}\backslash ).$ The object consists of a $4-$lb slender bar bonded to a $\backslash (10-\backslash$mathrm$\{$lb$\}\backslash )$ disk. It is released from rest in the horizontal position $1$ and falls to position $2.$ What force is exerted on the object by the pin at $\backslash ($ A $\backslash )$ when it is in position $2?$