The "SUVAT" equations refer to the five equations: $$v=u+at$$ $$s=ut+\frac{1}{2}at^2$$ $$v^2=u^2+2as$$ $$s=\frac{1}{2}\left(v+u\right)t$$ $$s=vt-\frac{1}{2}at^2$$ of which the first three are the most commonly taught and used.
These equations are applicable only for a particle moving under the influence of a constant acceleration. Speeds should be non-relativistic.
The name "SUVAT" comes from the variables used:
- s: Displacement of particle (in time t)
- u: Initial velocity
- v: Final velocity (after time t)
- a: Acceleration
- t: Time
The equations hold for vectors as well.