# Stokes' law and frictional force

## Homework Statement

Derive an expression for frictional force
acting on a spherical objects of radius R
moving with velocity V
in a continuous viscous fluid of fluid's viscosity η .

## Homework Equations

please do not use dimension analysis to prove.

## The Attempt at a Solution

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Hootenanny
Staff Emeritus
Gold Member

## Homework Statement

Derive an expression for frictional force
acting on a spherical objects of radius R
moving with velocity V
in a continuous viscous fluid of fluid's viscosity η .

## Homework Equations

please do not use dimension analysis to prove.

## The Attempt at a Solution

Welcome to Physics Forums.

As per the forum guidelines, we can only help you with your homework if you have provided an acceptable attempt yourself.

Apart from "Mechanics of Continuous Media",i have good understanding of other undergraduate physics topics as well.
I do not have enough time to go through the whole of fluid dynamics.
i want to know only 3 things in Mechanics of Continuous Media fo my exam.
(a) proof of stokes's law,poiseuille equation,elastic constants and their inter-relation.

Hootenanny
Staff Emeritus
Gold Member
Apart from "Mechanics of Continuous Media",i have good understanding of other undergraduate physics topics as well.
I do not have enough time to go through the whole of fluid dynamics.
i want to know only 3 things in Mechanics of Continuous Media fo my exam.
(a) proof of stokes's law,poiseuille equation,elastic constants and their inter-relation.
Then I suggest you look through your lecture notes and textbooks. You will not be spoon fed answers here. However, if you are willing to put some effort in, we are more than happy to help you.

NOw i know the proof of stokes's law,poiseuille equation.
I never believed that the proof would be such a general one(u only need to know newton's law).
All book except one(physical fluid mechanics by d.j tritton)were providing proof after digging into 100s of pages of fluid dynamics .
thanks D.J TRITTON
thanks you as well, even for not helping me.

NOw i know the proof of stokes's law,poiseuille equation.
I never believed that the proof would be such a general one(u only need to know newton's law).
All book except one(physical fluid mechanics by d.j tritton)were providing proof after digging into 100s of pages of fluid dynamics .
thanks D.J TRITTON
thanks you as well, even for not helping me.