A shaft 4in. in diameter moving through a well oiled sleeve that is 12in. long. The force required to move the shaft is 25 lbf, and the shaft velocity is 5in./s. The oil filled clearance between the shaft and the sleeve is 0.005in. Calculate the viscosity of the lubricating oil (a Newtonian fluid). Sleeve ✓ 25 lbf 5 in./s 0.005 (clearance)