12–191. The arm of the robot moves so that r= 3 ft isconstant, and its grip A moves along the path z = (3 sin 40) ft,where 0 is in radians. If 0 = (0.51) rad, where t is in seconds,determine the magnitudes of the grip's velocity andacceleration when t = 3 s.*12-192. For a short time the arm of the robot is extendingsuch that i = 1.5 ft/s when r= 3 ft, z = (47) ft, and0 = 0.5t rad, where t is in seconds. Determine themagnitudes of the velocity and acceleration of the grip Awhen i = 3 s.

Given r = 3 ft z = (3 sin 40) ft θ = (0.5t ) rad t = 3s

Answered: 12–191. The arm of the robot moves so…

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