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  3. 3 a cylinder of diameter r 2 cm and length...

Question: 3 a cylinder of diameter r 2 cm and length...

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3. A cylinder of diameter R 2 cm and length L 5 cm rotates inside a concentric pipe at 7200 RPM (rotations per minute). The small gap between the cylinder and the pipe measures h-0.04 mm and is filled with oil having a viscosity 0.02 P. Note that 1 P 1 Poise-0.1 Pa s (a) Compute the shear stress exerted on the cylinder. (b) Find the total frictional force, power and torque required to rotate the cylinder

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