Current Attempt in Progress

Bar OC rotates with a clockwise angular velocity ${}_{OC}=3\mathrm{.}8ra\frac{d}{s}$ and a counterclockwise angular acceleration $a_{OC}=1\mathrm{.}8ra\frac{d}{s^2}.$ The bar $OC$ is a slotted member which accommodates the pin A attached to the sector. Determine the angular velocity $$ and the angular acceleration $a$ of the sector. The angular velocity and the angular acceleration are positive if counterclockwise, negative if clockwise.

Assume $\frac{?}{\text{b}\text{a}\text{r}}(OA)=630mm,d=430mm,=32.$