Question $4$

A $0,5m^2$ flat plate is sliding on a fixed plate separated by a layer of fluid $0,5mm$ thick. If a force of $1$ N is

required to keep the plate moving at $0$;$25\frac{m}{s},$ determine the dynamic viscosity of the fluid.

$($A$)0\mathrm{.}004k\frac{g}{m}.s$

$0\mathrm{.}000004k\frac{g}{m}.s$

$0\mathrm{.}000250k\frac{g}{m}.s$

$0\mathrm{.}025k\frac{g}{m}.s$

$0\mathrm{.}4$ Poise