The Five SUVAT Equations (Constant Acceleration Only)
| # | Equation | Missing Var |
|---|---|---|
| 1 | v = u + at | s |
| 2 | s = ut + (1/2)at^2 | v |
| 3 | v^2 = u^2 + 2as | t |
| 4 | s = (u+v)t/2 | a |
| 5 | s_n = u + a(2n-1)/2 | v (nth second) |
Dimensional check for Eq 2: [s] = [L], [ut] = [LT^{-1}][T] = [L], [(1/2)at^2] = [LT^{-2}][T^2] = [L]. Consistent.
Critical condition: These equations are INVALID for variable acceleration. Use calculus (v = ds/dt, a = dv/dt) instead.