. State Stokes’ Law
When a solid object moves through a fluid then, its motion is opposed by viscous force. This viscous force exerted by fluid on object depends on
i. Velocity (v) of body
ii. Size of body
iii. Shape of body
iv. Viscosity of fluid
The viscous force (or drag) Fv on a spherical body of radius (r) moving with velocity (v) in a medium of viscosity (n ) is given by
This relation is called Stokes’ law.