Fluid Mechanics for Civil Engineering

Chapter $1-$ Basic Fluid Properties

Class Exercise $1\mathrm{.}1$: $,d=250$

A hydraulic lift of the type commonly used for greasing automobiles consists of a $250mm$ diameter ram that slides in a diameter cylinder. The annular space between the cylinder and the ram is filled with a $0\mathrm{.}075mm$ thick oil having a kinematic viscosity of $3\mathrm{.}53**{10}^{-4}\frac{m^2}{s}$ and $SG$ of $0\mathrm{.}83.$ If the rate of travel of the ram, $V$ is $0\mathrm{.}15\frac{m}{s},$ find the frictional resistance, $F$ when a ram of $2m$ long is engaged in the cylinder.