Spherical balls of radius … are falling in a viscous fluid of viscosity … with a velocity … The retarding viscous force acting on the spherical ball is

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Properties of Matter

JEE Main 2004 · Annual, Paper 1 · Q7891

PhysicsEasy148×since 2002Q7891

Spherical balls of radius

R

are falling in a viscous fluid of viscosity

\eta

with a velocity

v.

The retarding viscous force acting on the spherical ball is