Question

how would equation of motion change in case of freefall

Answer 1

a will be replaced by -g=-10

Answer 2

The equations of motion are-

V=U+at

S=Ut+1/2at^2

V^2=U^2+2as

In equations for freely falling objects,we replace acceleration(a) with acceleration due to gravity(g) and distance(S) by height(h).So the equations are-

V=U+gt

h=Ut+1/2 gt^2

V^2=U^2+2gh