modeled as shown in $$ Fig. P$3\mathrm{.}13$ and $$ Fig. P$3\mathrm{.}14.$ It is known that the connecting rod $AB$ exerts on the crank $BC$ a $2\mathrm{.}5-kN$ force directed down and to the left along the centerline of $AB.$ Determine the moment of the force about $C.$

Fig. P$3\mathrm{.}13$

$140\mathrm{.}0N*m$