Question

The two ends of a train moving with uniform acceleration pass a certain point with velocities "u" & "v". The velocity with which the middle portion of the train passes the same point is -???????????????????????????????????????????????????????????????????????????????????????????????? Plz help:)

Answer 1

Its answer is: -\[\LARGE \color{red}{\sqrt{\frac{u^2+v^2}{2}}.}\]

Answer 2

\[\color{blue}{\text{But}}\space \color{green}{\text{How}}\?\]