A uniform slender rod of length L = 900 mm and mass m = 1 kg hangs freely from a hinge at...

A uniform slender rod of length L = 900 mm and mass m = 1 kg hangs freely from a hinge at A. If a force P of magnitude 3.5 N is applied at B horizontally to the left (h = L), determine (a) the angular acceleration of the rod, (b) the components of the reaction at A.