A cylinder of weight ( 90 N) slides in a lubricated pipe as shown in the figure . The clearance between the cylinder and pipe is ( 0.025 mm). If 12.5cm the viscosity of the oil is ( 6.6 x 10 Pa.s ), calculate the tension cylinder force required to raise the cylinder at a speed of (6.12 m/s ) with a deceleration of ( 0.61 m/s³)? 15cm

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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.