2. A rotating shaft supports three masses m= 40 kg, m2 = 45 kg and m3 = 30 kg at radii 40 mm, 38 mm and 35 mm, respectiv

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2 A Rotating Shaft Supports Three Masses M 40 Kg M2 45 Kg And M3 30 Kg At Radii 40 Mm 38 Mm And 35 Mm Respectiv 1 (36.64 KiB) Viewed 12 times

2. A rotating shaft supports three masses m= 40 kg, m2 = 45 kg and m3 = 30 kg at radii 40 mm, 38 mm and 35 mm, respectively, as illustrated in Figure 1. The supporting bearings are at A and B. At the instant shown, (a) Calculate the relative angular direction of reactions in bearings A and B with respect to the x-axis due to out-of-balance masses. (b) Calculate the magnitudes of the dynamie bearing reactions in bearings A and B due to out-of-balance masses if the shaft is rotating at 1500 rev/min. (e) Calculate the static reactions on bearing A. (d) Calculate the speed at which the shaft should be run so that the total minimum total reactions in bearing A is zero. KNUST/ME 261 Page 1 of 2 у 400 mm, 550 mm 500 mm 450 mm Ri 45° A B 60° R R m2 m2 ms (a) (b) Figure 1