Spherical balls of radius R are falling in a viscous fluid of viscosity with a velocity v . The retarding viscous force acting on the spherical ball i - Physics MCQ AIEEE 2004 2026 | ExamTest.live

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Spherical balls of radius R are falling in a viscous fluid of viscosity η with a velocity v . The retarding viscous force acting on the spherical ball is:

Solution & Step-by-step Explanation

According to Stokes' Law, the viscous drag force F on a spherical body is: F = 6 π η R v Where η is viscosity, R is radius, and v is velocity.From the formula, F \propto R and F \propto v .

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Spherical balls of radius R are falling in a viscous fluid of viscosity η with a velocity v . The retarding viscous force acting on the spherical ball is:

directly proportional to R but inversely proportional to v .

directly proportional to both radius R and velocity v .

inversely proportional to both radius R and velocity v .

inversely proportional to R but directly proportional to velocity v .

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