Physics - Fluid Question with Solution | TestHub

When sphere dropped through a tube full of viscus liquid acquires constant velocity, it is called terminal velocity

$\mathrm{v}=\frac{2{\mathrm{r}}^2\left(\mathrm{\rho }-\mathrm{\sigma }\right)\mathrm{g}}{9\mathrm{\eta }}\Rightarrow \mathrm{v}\propto \mathrm{ }{\mathrm{r}}^2$
∴