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Spherical balls of radius 'R' are fallin...

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

A

Inversely proportional to ' r ' but directly proportional to velocity ' v '

B

Directly proportional to both radius ' r ' and velocity ' v

C

Inversely proportional to both radius ' r ' and velocity ' v '

D

Directly proportional to ' r ' but inversely proportional to ' v '

Text Solution

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The correct Answer is:
B
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