。 30° 300 60° 150 45 120 B 500 rpm (mm) A AB=300 AC 500 Fig. 2.52 For the four-link mechanism shown in Fig. 2.52, find the linear velocities of sliders C and D and the angular velocities of links AC and BD. [2.1 m/s; 0.38 m/s; 1.14 rad/s; 5.93 rad/s]