Problem F12-37 Dynamics Hibbeler 13th (Chapter 12)

The collars are pin connected at B and are free to move along rod OA and the curved guide OC having the shape of a cardioid, r = [0.2(1 + cos(theta))] m. At theta = 30 deg, the angular velocity of OA is theta_dot = 3 rad/s. Determine the magnitude of the velocity of the collars at this point.