hydraulic lift of the type commonly used
for greasing automobiles consists of a
280.00-mm-diametcr rarn that slides in a
280.18-mm-diameter cylinder (similar to
Fig. P2.21), the annular space being filled
with oil having a kinematic viscosity of
0.00042 m2/s and specific gravity of 0.86. If
the rate of travel of the ram is 0.22 m/s. find
the frictional resistance when 2 m of the
ram is engaged in the cylinder.