A force of 3.14 N is required to drag a ...

A force of `3.14 N` is required to drag a sphere of radius `4 cm` with a speed of `5 ms^(-1)` in a medium in gravity free space. Find the coefficient of the viscosity of the medium.

`8.3xx10^-5poise`

`4.3xx10^-5poise`

`7.4xx10^-5poise`

`2.3xx10^-5poise`

Text Solution

Verified by Experts

The correct Answer is:

`F=6pietarv`
`eta=(F)/(6pirv)=(3.14)/((6)(3.14)(5xx10^2))=8.3xx10^-5poise`

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