Which statement about the rigid bar CD is correct if the bar is connected to the collar at its end points by ball-and-socket joints: 

A) angular velocity o is acting perpendicular to the axis of the bar B) angular velocity o is acting parallel to the axis of the bar C) angular velocity o is zero D) angular velocity o cannot be determined -2 m- vc = 3 m/s -1 m- B Y A 1 m E 0.5 m