A cylindrical object with a mass of m = 4.65 lbm slides into a pipe downward. The object has a diameter of d = 8.4 inches and a height of h = 9.9 inches. The pipe is covered with an oil film having a thickness of y = 0.018 inches and viscosity of 0.125 lbf 's/ft?. How fast is the object %3D %3! falling downward?

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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.