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A solid ball of density rho(1) and radiu...

A solid ball of density `rho_(1)` and radius r falls vertically through a liquid of density `rho_(2)`. Assume that the viscous force acting on the ball is `F = krv`, where `k` is a constant and v its velocity. What is the terminal velocity of the ball ?

A

`(4pi g r^2(rho_1-rho_2))/(3k)`

B

`(2pi r(rho_1-rho_2))/(3gk)`

C

`(2pi g(rho_1 + rho_2))/(3gr^2k)`

D

None of these

Text Solution

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The correct Answer is:
A
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