Question

what are the equations of a body moving wit the constant acceleration(a)?

Answer 1

If you need to find its velocity
then
\[v=u+at\]
v=velocity at time t
u= initial velocity
a=acceleration
If you need to find the distance (S) it covers in time t, it's given by
\[S=ut+\frac{1}{2} at^2\]

Answer 2

There is another relation, final velocity in terms of S
\[v^2-u^2=2aS\]
here v= velocity when the body has covered distance S