$10\frac{m}{s^2}$ if needed.

Problem $1$: The distance between two fixed parallel plates is $20$ mm and has been full filled with Newtonian liquid having kinematic viscosity of $0\mathrm{.}8{10}^{-3}\frac{m^2}{s}.$ Another square $(200mm200mm)$ horizontal plate is moving within the plates with constant velocity of $1\mathrm{.}0\frac{m}{s}$ and $5$ mm distance from bottom plate $($see Figure$).$ Considering linear distribution of velocity in the fluid. determine total friction force acting on the moving plate $(20$ score$).$