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A shaft is rotating at a uniform speed with four masses m1,m2,m3 and m4 of
magnitudes 300 kg, 450kg, 360kg and 390 kg respectively. The masses are
rotating in the same plane. The corresponding radii of rotation are 200mm,
150mm, 250mm and 300mm. The angles made these masses with respect to
horizontal are 0°, 45°, 120° and 255° respectively. Find the magnitude and
position of balance mass if it radius of rotation is 200mm.

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