According to Stokes' law, the viscous drag on a sphere of radius $r$ moving with velocity $v$ through a fluid of viscosity $\eta$ is:

1. A $4\pi\eta rv$
2. B $6\pi\eta rv$ Correct answer
3. C $2\pi\eta rv$
4. D $8\pi\eta rv$

Solution

Stokes' law: $F = 6\pi\eta rv$.

About this question

Subject: Physics · Chapter: Properties of Solids and Liquids · Topic: Viscosity

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