Resistance to the flow of liquid is called viscosity.
is a velocity gradient, η is a viscosity coefficient, A is area
Putting, F = N, dx=m, A= m2,v=ms-1
η= N/m2. m/ms-1
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)
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