The three equations are,
v = u + at.
v² = u² + 2as.
s = ut + ½at²
First equation:
The first equation of motion gives the relation between "velocity and time".
v = Final velocity
u = Initial velocity
a = Acceleration , due to gravity in earth , which is (-10m/s)
t = Time
Second equation:
The second equation of motion "gives the position-time relation".
v^2 = square of Final velocity
u^2 = square of initial velocity
2* a = 2 * acceleration
s = Displacement
Third equation:
The third equation of motion "gives the final velocity of an object under uniform acceleration given the distance traveled and an initial velocity".
s = Displacement
ut = Initial velocity * time
1/2at^2 = 1/2 * acceleration * time^2