Question

Viscous drag force depends on

• A. Size of body
• B. Velocity with which it moves
• C. Viscosity of fluid
• D. All of the above

Answer 1

The correct option is D All of the above

According to Stoke's law, viscous drag force is given by
$F_D=6\pi \mu rv$
where, $r=$ radius of sphere
$v=$ velocity
$\mu =$viscosity of fluid
So, viscous drag force depends on size of the body, velocity and viscosity of fluid.