Question

Consider the following equation of motion and re write them for a free falling body v=u+at s=ut+1/2 at square

Answer 1

For a free fall body accelration of Body becomes equal to acceleration due to gravity so we will replace a by g
so. v= u+ gt

Answer 2

In this case "a" becomes "g"
therefore v=u+at become v=u+gt
                here u initial velocity is zero in freely falling body
                                 v=0+gt
                                 v=gt
in s=ut+1/2at^2
    s=ut+1/2gt^2
    s=0*t+1/2gt^2
    s=1/2gt^2