2.65 A circular aluminum shaft mounted in a journal is shown. The symmetric clearance gap between the shaft and journal is filled with SAE 10W-30 oil at T = 30°C. The shaft is caused to turn by the attached mass and cord. Develop and solve a differential equation for the angular speed of the shaft as a function of time. Calculate the maximum angular speed of the shaft and the time required to reach 95 percent of this speed. Clearance, a = 0.5 mm ↓ R = 25 mm P2.65 + 2 100 L = 50 mm 1.5 L M - M = 10 g