Calculate the dynamic viscosity of an oil, which is used for lubrication between a square plate of size 0.8m x 0.8m and an inclined plane with angle of inclination 30° as shown below. The weight of the square plate is 300N and it slides down the inclined plane with a uniform velocity 0.3m/s. The thickness of oil film is 1.5mm. OIL t = 1.5 mm u = 0.3 m/s SER 30⁰ FROM W = 300 N

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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.