Meriam, Kraige & Bolton — Plane Kinematics of Rigid Bodies: Problem 5_122

5/122 The four-bar linkage of Prob. 5/69 is repeated here. If the angular velocity and angular acceleration of drive link OA are 10 rad/s and 5 rad/s², respectively, both counterclockwise, determine the angular accelerations of bars AB and BC for the instant represented. (From Problem 5/69: \(L_{OA} = 80\) mm, \(\theta_{OA} = 60^\circ\); \(L_{AB} = 240\) mm, \(\theta_{AB} = 15^\circ\) from horizontal; \(L_{BC} = 200\) mm, link BC is vertical at the instant shown.)