For the rotating and oscillating control arm OA of Prob. 7/22, determine the velocity v and acceleration a of the ball tip A for the condition when t = 1/2 s. Distance b = 120 mm, s = 100 mm, and θ = θ₀ sin 4Ωt as defined in Prob. 7/22 with Ω = π rad/s and θ₀ = π/6 rad.

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| AC Y X- Problem 7/22