A body is freely falling from top of tower of height H, then the

velocity of a body after immediate 1 second of fall is

A body is allowed to fall freely from height H

Then initial velocity $\text{u}=0$

Acceleration due gravity $a=+\text{g}$   

t = 1s

The final velocity $\text{v}=\text{u}+a\text{t}$

$\text{v}=\text{gt}$

$\text{v}=9.8\text{m/s}\because \text{g}=9.8{\text{m/s}}^{\text{2}},\text{t}=1\text{s}$  

We get final velocity attained after immediate is fall depends on

1. Time of fall 2) Acceleration due to gravity at that place

So, Final velocity is independent of

1. Height from which it is falling