Question: A 1 0 - c m - diameter cylindrical shaft rotates inside a 5 0 - c m - long 1 0 . 3 -

A 10-cm-diameter cylindrical shaft rotates inside a 50-cm-long 10.3-cm diameter bearing. The space between the shaft and the bearing is completely filled with oil whose viscosity at anticipated operating temperature is 0.300N*sm2. Determine the power required to overcome friction when the shaft rotates at a speed of (a)600 rpm and (b)1200 rpm .
A 1 0 - c m - diameter cylindrical shaft rotates

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