Solve Prob. 15.166, assuming that the direction of the relative velocity u is reversed so that portion BD is being retracted. Problem 15.166: The motion of nozzle D is controlled by arm AB. At the instant shown the arm is rotating counterclockwise at the constant rate ω = 2.4 rad/s and portion BC is being extended at the constant rate u = 250 mm/s with respect to the arm. For each of the arrangements shown, determine the acceleration of nozzle D.

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100 100m