Question

State Stokes' law and derive it by dimensional analysis.

Answer 1

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Answer 2

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STOKES LAW

• The law that the force that retards a sphere moving through a viscous fluid is directly proportional to the velocity of the sphere, the radius of the sphere, and the viscosity of the fluid. the law that the frequency of luminescence induced by radiation is usually less than the frequency of the radiation.

According to this law F = 6πrηv, where

• r is the radius of the ball
• v is its velocity
• η is the viscosity of the medium.