The dynamic viscosity of lubricating oil used between shaft and sleeve is 12 poise. The diameter of the shaft, which rotates at \(240 \mathrm{rpm}\), is 0.5 \(\mathrm{m}\). The sleeve length is \(120 \mathrm{~mm}\). Calculate the power lost if the thickness of oil film is \(2.5 \mathrm{~mm}\).