# Absolute & Kinematic Viscosity for Newtonian Fluids | Fluid Mechanics

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This video is about viscosity where we look at a Newtonian fluid and define and distinguish absolute and kinematic viscosity. A Newtonian fluid is defined as the shear stress equal to the absolute viscosity multiplied by the rate of shearing strain (change in speed over the change in height). For Newtonian fluids the shear stress is proportional to the shearing strain i.e the absolute viscosity is constant. Kinematic viscosity is then defined as the absolute viscosity divided by the density of the fluid. Finally it is noted that both the absolute and kinematic viscosity are temperature dependent.