1. The problem statement, all variables and given/known data A triangular body changes orientation as the suspporting links rotate. At the moment shown, theta = 90 deg, theta_dot = 5 rad/s, and beta = 45 deg. Determine vA and the angular velocity of the triangular body. rB/C = 2j cm and rB/A = 5i cm Points E and D are fixed. theta is the angle made between horizontal and BE. beta is angle made between horizontal and AD. 2. Relevant equations vB = vE + w x rB/E vB = vA + w x rB/A 3. The attempt at a solution vB=vE + w x rB/E vB=0 + 5k x 2j[/b] vB=-10i vB=vA + w x rB/A -10i = vA + w x 5j I am stuck at this point because I am not sure if I should use theta_dot for this w because AD is at a different angle (beta). And if I do need to use a different w (which would be beta_dot how would I find it without knowing the length of AD.