1. A shaft carries four masses A, B, C, D are to be completely balanced (Fig. Q1). The position of the planes and angular positions of masses are as shown below. Find (i) The magnitude and the angular position of mass A ( The mass A revolves at radius of 180mm); and (ii) The position of planes A and D. -ve R.P. B +ve 300- X 40 kg (a) Position of planes. 50 kg C 120 120% B 210 240 150 30 kg (b) Angular position of masses.