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A pivot bearing used on the shaft of an electrical instrument is shown in Fig

Mechanical Engineering

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A pivot bearing used on the shaft of an electrical instrument is shown in Fig. P1.86. An oil with a viscosity of μ 0.010 lb . s/ft² fills the 0.001-in. gap between the rotating shaft and the stationary base. Determine the frictional torque on the shaft when it rotates at 5000 rpm.