For a short time the arm of the robot is extending at a constant rate such that r = 1.5ft/s...

For a short time the arm of the robot is extending at a constant rate such that r = 1.5ft/s when r =3ft, z = (4t^2) and u = 0.5t rad where t is in seconds. Determine the magnitudes of the velocity and acceleration of the grip A when t = 3 s.

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