The rod OA rotates clockwise with a constant angular velocity of $\backslash (\backslash$mathbf$\{6\}\backslash )$ rad$/$s$.$ Two pin$-$connected slider blocks, located at B$,$ move freely on OA and the curved rod whose shape is a lima$$on described by the blocks at the instant $\backslash (\backslash$boldsymbol$\{\backslash$theta$\}=\backslash$mathbf$\{120\}^\{\backslash$circ$\}\backslash ).$