Meriam, Kraige & Bolton — Plane Kinetics of Rigid Bodies: Problem 6_29

6/29 The uniform 100-kg beam is freely hinged about its upper end A and is initially at rest in the vertical position with \(\theta = 0\). Determine the initial angular acceleration \(\alpha\) of the beam and the magnitude \(F_A\) of the force supported by the pin at A due to the application of the force \(P = 300\text{ N}\) on the attached cable.