In Figure-1, the crank CB oscillates about point C through a limited arc, causing crank OA to oscillate about point O. At the position shown, where CB is horizontal and OA is vertical, the angular velocity of CB is 4 rad/s counterclockwise. (a) Determine the angular velocities of links OA and AB at this instant. (b) Determine the angular accelerations of links OA and AB at this instant. Observe the direction signs (positive and negative) for the position vectors, velocities and accelerations in the given xy plane. y A ΤΑ/Β 75 mm 100 mm гB- TA 50 mm B WCB -250 mm- Figure-1

In Figure-1, the crank CB oscillates about point C through a limited arc, causing crank OA to oscillate about point O. At the position shown, where CB is horizontal and OA is vertical, the angular velocity of CB is 4 rad/s counterclockwise. (a) Determine the angular velocities of links OA and AB at this instant. (b) Determine the angular accelerations of links OA and AB at this instant. Observe the direction signs (positive and negative) for the position vectors, velocities and accelerations in the given xy plane. y A ΤΑ/Β 75 mm 100 mm гB- TA 50 mm B WCB -250 mm- Figure-1