Physics Question on mechanical properties of fluid

Question

A $20\,cm$ long capillary tube is dipped vertically in water and the liquid rises upto $10\, cm$ . If the entire system is kept in a freely falling platform, the length of water column in the tube will be

Answer 1

Solution

The height raised by liquid in capillary tube
$h=\frac{2 l \cos \theta}{\rho g h}$
As in freely falling platform, a body experience weightlessness.
So, the liquid will rise upto to length of the capillary.
i.e. height raised by the liquid will be $20\, cm$ .