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. + ve B C 300- 50 kg C D 120 120° 210° 240 B O 150 30 kg X 40 kg (a) Position of planes. All dimensions in mm. (b) Angular position of masses. Fig Q1. Balancing of masses