Question

what is first equation of motion ?​

Answer 1

The first equation of motion (Vf =Vi + at) deals with final velocity, initial velocity, acceleration and time. We can use the 1st equation of motion to find final velocity, initial velocity, acceleration and time

Answer 2

All three equation are:

$3. \: s = ut + {at}^{2}$

$2. \: {v}^{2} = {u}^{2} + 2as$

$1. \: v = u + at$

First equation is v=u+at