In the design of a produce-processing plant, roller trays of produce are to be oscillated under water spray by the action of the connecting link AB and crank OB. For the instant when θ = 15°, the angular velocity of AB is 0.086 rad /s clockwise. Find the corresponding angular velocity θ˙ of the crank and the velocity v_A of the tray. Solve the relative-velocity equation by either vector algebra or vector geometry.

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В 900 mm A 300 mm