Rod AB is welded to the 0.3-m-radius plate, which rotates at the constant rate 1 = 6

Rod AB is welded to the 0.3-m-radius plate, which rotates at the constant rate ω1 = 6 rad/s. Knowing that collar D moves toward end B of the rod at a constant speed u = 1.3 m, determine, for the position shown, (a) the velocity of D, (b) the acceleration of D.

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0.2 m LI 0.25 m 0.3 m