Question: 2.22 A cylinder 8 in. in diameter and 3 ft long is concentric with a pipe of 8.25 in. i.d. Between the cylinder and pipe

2.22 A cylinder 8 in. in diameter and 3 ft long is concentric with a pipe of 8.25 in. i.d. Between the cylinder and pipe there is an oil film.

Find the force required to move the cylinder along the pipe at a constant velocity of 3 fps. The kinematic viscosity of the oil is 0 006 ft2 s; the specific gravity is 0.92.

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