A rotating disc of 1 m diameter has two eccentric masses of 0.5 kg each at radii of 50 mm and 60 mm at the angular positions of 0 degree and 150 degree respectively. A balancing mass of 0.1 kg is to be used to balance the rotor. What is the radial position of the balancing mass?
1
50 mm
2
120 mm
3
150 mm
4
280 mm