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MHT CET 2023 (10 May, Shift 2) · Viscosity & Stokes' Law

Viscosity & Stokes' Law question from MHT CET 2023 (10 May, Shift 2)

Q14MHT CET 2023 · 10 MAY · SHIFT 2Medium

Viscosity & Stokes' Law

A metal sphere of mass ' $m$ ' and density ' $\sigma_1$ ' falls with terminal velocity through a container containing liquid. The density of liquid is ' $\sigma_2$ '. The viscous force acting on the sphere is

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Answer: (c)

At terminal velocity: $F_v = mg - B$ .
$B = V\sigma_2 g = \frac{m}{\sigma_1}\sigma_2 g$
$F_v = mg\left(1 - \frac{\sigma_2}{\sigma_1}\right)$
So the answer is (c).

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