If we have two plates, a lower fixed plate and an upper moving plate and the fluid between them is SAE$30$ oil at $N*\frac{s}{m^2})$ and the distance between them is $h=7mm,$ what shear stress is required to move the upper plate at $3\mathrm{.}5\frac{m}{s}?($Hint: Velocity changes linearly with distance$)$

a$.200$ Pa

b$.180$ Pa

c$.220$ Pa

d$.250$ Pa

Clear my choice