The disc shown in Fig. P6.81 has a diameter D of 1 m and arotational speed of 1800 rpm
Chapter 6, Problem 6.81(choose chapter or problem)
The disc shown in Fig. P6.81 has a diameter D of 1 m and arotational speed of 1800 rpm. It is positioned 4 mm from a solidboundary. The gap is filled with 15 C SAE 10W oil. Find thetorque required to overcome the frictional resistance of the oil onthe disc. Assume that the circumferential velocity (V) is linearacross the gap at the each radius r.
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