In the design of this linkage, motion of the square plate is controlled by the two pivoted links. Link OA has a constant angular velocity w = 4 rad/s during a short interval of motion. For the instant represented, θ = tan⁻¹ 4/3 and AB is parallel to the x-axis. For this instant, determine the angular acceleration of both the plate and link CB.

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160 O 100,mm mm OB 160 mm A 220 mm C. 120 mm 200 mm