A four-bar linkage is shown in the figure (the ground "link" OC is considered the fourth bar). If the angular velocity and angular acceleration of drive link OA are 6.1 rad/s and 6.6 rad/s² respectively, both counterclockwise, determine the angular accelerations of bars AB and BC for the instant represented. The angular accelerations are positive if counterclockwise, negative if clockwise. 14° 285 mm A 95 mm 245 mm 000 169° CO Answers: αAB= i 390.82 rad/s² ABC = i 465.7 rad/s²

The wheel in the figure rotates clockwise with a constant angular velocity of 120 rpm. The pin Dis fixed to the wheel at a point 125 mm from its center and slides along the guide in the arm AB. Determine: (a) The angular velocity AB (rad/s). b) The angular acceleration AB of the arm at the instant shown (rad/s2). 60 120 грm 375 mm

A piston, connecting rod and crank mechanism is shown in the diagram. The crank rotates at a constant velocity of 300 rad/s. Find the acceleration of the piston and the angular acceleration of the link BC. The giagram is not drawn to scale. Crank AB is rotating in clockwise direction.

For the instant represented, crank OA has an angular velocity of wOA=20 rad/s CW. The angular velocity of the connecting rod AB, and the velocity of point B, vB are closest to: 60 mm A OA 120 mm 200 mm G B

please solve as symbolically as possible

A four-bar linkage is shown in the figure (the ground "link" OC is considered the fourth bar). If the angular velocity and angular acceleration of drive link OA are 6.1 rad/s and 6.6 rad/s² respectively, both counterclockwise, determine the angular accelerations of bars AB and BC for the instant represented. The angular accelerations are positive if counterclockwise, negative if clockwise. 14° 285 mm A 95 mm 245 mm wo /69° 土 Answers: αAB= i 2.356 rad/s² αBC= i 11.327 rad/s²

At the instant given, shown in the figure below, the angular velocity and angular acceleration of bar B1 are 0.28 O rad/sec and 0.12 O rad/sec?. Find the magnitude of angular acceleration of B3 at this instant. B, 18 15 B, 24" 30" Hint: You can use the two point formula for velocity to go from one support to the other. The velocity at the first support is zero, the velocity calculated at the other end is dependent on the two unknown angular speeds. Use the fact the velocity at the other support is zero to calculate the two angular velocities. Similarly, use the two point formula for acceleration to go from one support to the other. Again the acceleration of the supports is zero which can be used to calculate the two angular accelerations. Figure is from "Engineering Mechanic An Introduction to Dynamics", McGill and King.

Q1. Use the graphical method only, find the velocity of the piston for the system shown below and the angular velocity of the link AB about point A. The crank OA rotates counter clockwise at 3000 rev/min. If the angular acceleration of the crankshaft OA is 1200 rad/s, determine the angular acceleration of the connecting rod AB. Assume that OA = 150mm, AB = 250mm, angle BOA = 60°, ABO = 25°. G

A piston, connecting rod and crank mechanism is shown in the diagram. The crank rotates at a constant velocity of 300 rad/s. Find the acceleration of the piston and the angular acceleration of the link BC. The diagram is not drawn to scale. 300 rad/s A 600 50 mm /////// 170 mm B

A) Determine the angular velocity of the slotted link AC at this instant measured counterclockwise.    B) Determine the angular acceleration of the slotted link AC at this instant measured counterdockwise.