The pulley is mounted on a horizontal shaft supported by journal bearings. The coefficient of kinetic friction between the shaft and the bearings is μk = 0.3. The radius of the shaft is 20 mm, and the radius of the pulley is 150 mm. The mass m = 10 kg. Neglect the masses of the pulley and shaft. What force T must be applied to the cable to move the mass upward at a constant rate?
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