Question: A shaft 80 mm in diameter is being pushed through a bearing sleeve 80.2mm in diameter and 0.3 m long. The clearance, assumed uniform is

A shaft 80 mm in diameter is being pushed through a bearing sleeve 80.2mm in diameter and 0.3 m long. The clearance, assumed uniform is flooded with lubricating oil of viscosity 0.1 kg/ms. (a) If the shaft moves axially at 0.8 m/s, estimate the resistance force exerted by the oil on the shaft,

(b) If the shaft is axially fixed and rotated at 1800 rpm, estimate the resisting torque exerted by the oil and the power required to rotate the shaft.

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