(Solved): Rod OA rotates counterclockwise at a constant angular rate =9.4(rad/s). The double collar B is ...

Rod OA rotates counterclockwise at a constant angular rate $\stackrel{?}{?}=9.4(\mathrm{rad}/\mathrm{s})$. The double collar $\mathrm{B}$ is pin connected together such that one collar slides over the rotating rod and the other collar slides over the circular rod described by the equation $r=2.4\cos (?)$ (meters) . If both collars have a mass of $1.5\mathrm{kg}$, determine the force which the circular rod exerts on one of the collars at the instant $?=45^{?}$. Motion is in the vertical plane (gravity comes into play). Give the answer to the nearest Newton. (no decimals)