Spherical balls of radius R are falling in a viscous fluid of velo | Filo

Class 11

Physics

Mechanics

Mechanical Properties of Fluids

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151

Spherical balls of radius R are falling in a viscous fluid of velocity v. The retarding viscous force acting on the spherical ball is

1. directly proportional to R but inversely proportional to v.
2. directly proportional to both radius R and velocity v.
3. inversely proportional to both radius R and velocity v
4. inversely proportional to R but directly proportional to velocity v
Solution: Retarding force acting on a ball falling into a viscous fluid
velocity of ball
coefficient of viscosity
and or in words,
Retarding force is directly proportional to both and
730
151

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