Meriam, Kraige & Bolton — Plane Kinematics of Rigid Bodies: Problem 5_146

5/146 Determine the angular acceleration of link \(EC\) in the position shown, where \(\omega = \dot{\beta} = 2 \text{ rad/sec}\) and \(\ddot{\beta} = 6 \text{ rad/sec}^2\) when \(\theta = \beta = 60^\circ\). Pin \(A\) is fixed to link \(EC\). The circular slot in link \(DO\) has a radius of curvature of 6 in. In the position shown, the tangent to the slot at the point of contact is parallel to \(AO\).