The AB rod of the motion system rotates around the fixed axis of the rigid body, and the DC rod moves in the plane of the rigid body. The base point is B, and B is also on AB. The implicative translation of DC rod is the circular motion of point B around A. ..

The implicated velocity of point D is VE = VB = ω1* AB = 3 * 0.4 =1.2m/s.

What is the magnitude of the implicated acceleration at point D? ae=aabn=ω 1^2*ab=3^2*0.4=3.6m/s^3