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  4. A spherical body falling through a viscous liquid of infinite extent ultimately attains a constant value. when

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Q. A spherical body falling through a viscous liquid of infinite extent ultimately attains a constant value. when

Mechanical Properties of Fluids

Solution:

Viscous drag and upthrust acts upward and weight acts downward for constant velocity (terminal velocity). Viscous drag to liquid and upthrust should balance weight of the ball.