--- ELASTIC COLLISIONS ---
(vA' and vB' are final velocities)

vA' Formula:
vA=((m1-m2)/(m1+m2))*v1+(2*m2/(m1+m2))*v2

vB' Formula:
vB=(2*m1/(m1+m2))*v1+((m2-m1)/(m1+m2))*v2

--- TORRICELLI (NO TIME) ---
(vf = final, vi = initial, a = accel, d = dist)

Final Velocity:
vf=sqrt(vi^2+2*a*d)

Distance/Displacement:
d=(vf^2-vi^2)/(2*a)

Acceleration:
a=(vf^2-vi^2)/(2*d)