A 6-kg uniform plate rotates about A in a vertical plane under the combined effect of gravity and of the vertical force P. Knowing that at the instant shown the plate has an angular velocity of 20 rad/sec and an angular acceleration of 30 rad/sec2 both counterclockwise. Determine: a) The force P b) The components of the reaction at A (I = 0.15625 kg-m) 100 mm 125 mm 125 mm 500 mm P B