There are various methods to measure Viscosity, depending upon the type of materials used and the circumstances.
This is the reason that Fluids with high Viscosity need more force to move as compared to those of low Viscosity. Shearing occurs when a Fluid moves or is distributed, like pouring, spraying, spreading, mixing, etc. More is the Friction more is the amount of force required to move the layers this is called shear. The internal forces or Friction of Fluid comes into play when one layer of Fluid is subjected to move over another layer. It is a measure of the internal forces of a Fluid. Viscosity is the tendency of a Fluid to resist any change in its shape or Motion.
