Question

The terminal velocity of a sphere settling in a viscous fluid varies as

• A. The Reynolds number
• B. The square of its diameter
• C. Directly proportional to the viscosity of fluid
• D. Its diameter

Answer 1

The correct option is B The square of its diameter

Terminal velocity of a sphere settling in a viscous fluid is expressed by Stoke's equation.

$V=\frac{1}{18}\frac{g{d}^2({\rho }_s-{\rho }_u)}{\mu }$