A cylindrical shaft of radius 4 cm is rotating at a speed of 30 rad/s in a cylindrical bearing . Shaft and bearing are concentric . The lubricant of viscosity 0,4 Pa s and SG= 0,85 completely fills the clearance between shaft and bearing surface. Take clearance as 0,5 cm and length of shaft as 10 cm . The lubricant flow is laminar steady and uniform .Frictional force on shaft surface is ?
Lütfen birini seçin:

a. 4,47 N

b. 2,41 N

c. 5,53 N

d. 9,42 N

e. 1,23 N