Two parallel plates, one moving at 4 m/s and the otherfi xed, are separated by a 5-mm-thick layer of oil of specific gravity 0.80 and kinematic viscosity 1.25 E-4 m 2 /s.What is the average shear stress in the oil?( a ) 80 Pa, ( b ) 100 Pa, ( c ) 125 Pa, ( d ) 160 Pa, ( e ) 200 Pa

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Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.