By algebraic manipulation of the first two kinematic equations for one-dimensional motion:

Question

1) vf = vi + at
2) xf = xi + (vi)(t) + (1/2)(a)(t)^2
Obtain the other two kinematic equations :
3) vf^2 - vi^2 = 2ax
4) xf = xi + (1/2)(vi + vf)t