Question

r fall with velocity v through a liquid having coefficient of viscosity n . Find the viscous on n r and v. take k =bπ


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Answer 1

Answer:

small metal sphere of radius a is falling with a velocity v through a vertical column of a viscous liquid. If the coefficient of viscosity of the liquid is η, then the sphere encounters an opposing force of

A

6πηa2v

B

πa6ηv

C

6πηav

Correct Answer

D

6a3πηv