Determine the viscosity of lubricant between two flat plates, one fixed and other moving with velocity 0.60 m/s under a force of 5 N/m². The plates are 0.5 mm apart.
Given,
Velocity, V = 0.6 m/s
Force, F = 5 N/m²
\text { Thickness of fluid film }=0.5 mm =0.5 \times 10^{-3}Assuming linear velocity distribution,
\begin{aligned} \tau & =\mu \frac{d u}{d t} \\ 5 & =\mu \frac{0.6}{0.5 \times 10^{-3}} \\ \mu & =4.1667 \times 10^{-3} Pa s \end{aligned}