When the force P is applied to the plate $($Figure $1),$ the velocity profile for a Newtonian fluid that is confined under the plate is approximated by $u=(12y^{\frac{1}{4}})m\frac{m}{s},$ where $y$ is in mm $.$

Figure

$1$ of $1$

Part A

Determine the shear stress within the fluid at $y=8mm.$ Take $=0\mathrm{.}3({10}^{-3})N*\frac{s}{m^2}.$

Express your answer to three significant figures and include the appropriate units.

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