Engineering Board Exam Reviewer · Fluid Mechanics · medium

A plate moves at 2 m/s over a fixed plate separated by a 2 mm film of oil with = 0.05 Pa· s. Assuming a linear velocity profile, what is the shear stress on the plate?

1. 0.05 Pa
2. 0.00005 Pa
3. 5 Pa
4. 50 Pa

Answer

D. 50 Pa

Solution

= V/y = 0.05(2)/0.002 = 50 Pa.

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