An experiment was set-up to measure an unknown fluid's viscosity. two flat plates are separated by a gap of 4.5 mm and move relative to each other at a velocity of 5 m/s. the space between them is occupied by the unknown viscosity. the motion of the plates is resisted by a shear stress of 10 pa due to the viscosity of the fluid. assuming that the velocity gradient of the fluid is constant, determine the coefficient of viscosity of the fluid.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.