If link AB of the four-bar linkage has a constant counterclockwise angular velocity of 41 rad/s during an interval which includes the instant represented, determine the angular acceleration of AO (positive if counterclockwise, negative if clockwise) and the acceleration of point D. 90 mm B WAB L-x 245 mm Answers: A 150 mm 150 mm AO = 0 ap = (i -337.881 rad/s i+ i -2252.54 j) m/s