1.A 4 in. in diameter shaft moves through a well-oiled sleeve that is 12 in. long. The force required to move the shaft is 25 lbf, and the shaft velocity is 5 in./s. The oil-filled clearance between the shaft and the sleeve is 0.005 in. Calculate the viscosity of the lubricating oil (a Newtonian fluid).
2.Show how to find resultant vector mag and direction steps not just answer using parallelogram and triangle law, given angles are 25 and 50 degrees and α on this bolt step by step.