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- Engineering
- Solve this problem - Properties of Solids and Liquids - JEE Main-2
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
- Option 1)
directly proportional to
but inversely proportional to
- Option 2)
directly proportional to both radius
- Option 3)
inversely proportional to both radius
- Option 4)
inversely proportional to
Answers (1)
As we learnt in
Viscous force -
- wherein
From Stoke's law
Correct option is 2.
Option 1)
directly proportional to but inversely proportional to
This is an incorrect option.
Option 2)
directly proportional to both radius and
This is the correct option.
Option 3)
inversely proportional to both radius and velocity
This is an incorrect option.
Option 4)
inversely proportional to but directly proportional to velocity
This is an incorrect option.
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