What is SI unit of viscosity coefficient (η)?

Question

Philoid · Accepted Answer

Resistance to the flow of liquid is called viscosity.

F=η.A

Here,

is a velocity gradient, η is a viscosity coefficient, A is area

η =.

Putting, F = N, dx=m, A= m²,v=ms^-1

η= N/m². m/ms^-1

η= Nsm^-2

η is the proportionality constant , also known as coefficient of viscosity. SI unit of viscosity is Nsm^-2 = Pascal second (Pa s = 1kgm^-1s^-1)