(c) A, B, C and D are four masses carried by a rotating shaft at radii 100, 125, 200 and 150 mm respectively. The planes in which the masses revolve are spaced 600 mm apart and the mass of B, C and D are 10 kg. 5 kg, and 4 kg respectively as shown Figure Q3(e). Find the required mass A and the relative angular settings of the four masses so that the shaft shall be in complete balance. Lili -600 FIA All dimensions in mm 155 100 240" C Figure Q3 (c) 150 200 5 kg 10 kg C

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Free undamped vibrations

Whenever an object/system displaces in either side of its equilibrium position with the help of an external/internal means, then the object/system moves regularly or randomly on both sides of its equilibrium position. This motion is called vibration. Generally, there are three types of vibration: longitudinal vibration, transverse vibration, and torsional vibration.