Solve a constant-acceleration problem with three knowns
Enter any three of u, v, a, t, s and get the other two — the suvat equations applied for you.
Tools used in this guide
The job
Physics homework and crash estimates share the same three equations. The fiddly part is picking which equation isolates your unknown — the calculator does that for you.
Fill three, leave two
Enter exactly three of initial velocity, final velocity, acceleration, time, displacement. The tool solves the remaining two — e.g. u=0, a=9.8, t=3 gives v≈29.4 m/s and s≈44.1 m.
- Signs carry direction: downward acceleration can be −9.8 or +9.8 — just stay consistent.
- Vertical falls: put g into the acceleration field yourself.
Limits
Constant acceleration only — no drag, no changing forces. Time must be non-negative; where two mathematical roots exist the tool prefers the one with t ≥ 0, and if no root has t ≥ 0 it reports no consistent solution.