Two parallel plates are separated by a distance of $2\mathrm{.}0mm$ and there is a fluid contained between the plates. The bottom plate is stationary. The top plate moves with a velocity of $10m\frac{m}{s}$ when a force of $315{10}^{-5}N$ is applied to it$.$ When the force is increased to $1575{10}^{-5}N,$ the velocity increases to $50m\frac{m}{s}.$ The area of the plates is $1\mathrm{.}0d{m}^2.$ What is the viscosity of the fluid? Is the fluid Newtonian?