The 5-in.-radius drum rolls without slipping on a portion of a belt which moves downward to the left with a constant velocity of 6 in./s. Knowing that at a given instant the velocity and acceleration...

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The 5-in.-radius drum rolls without slipping on a portion of a belt which moves downward to the left with a constant velocity of 6 in./s. Knowing that at a given instant the velocity and acceleration of the center A of the drum are as shown, determine the acceleration of pointD.