The physics
Acceleration is the rate of change of velocity — how many metres per second of speed an object gains (or loses) each second. A car doing 0–100 km/h in 6 seconds averages about 4.6 m/s², roughly half a g.
Deceleration braking from 50 km/h to 0 in 2.5 s
Answer: acceleration = -5.556 m/s² (in g-force -0.567 g).
What we know
- Initial velocity: 50 km/h = 13.88888889 m/s (converted to the unit the formula takes)
- Final velocity: 0 m/s
- Time: 2.5 s
Step by step
- Given
- v₀ = 13.88888889 m/s, v₁ = 0 m/s, t = 2.5 s
- Formula
- a = (v₁ − v₀) / t
- Substitute
- a = (0 − 13.88888889) / 2.5
- Result
- a = -5.556 m/s²
All results
| Acceleration | -5.556 m/s² |
|---|---|
| In g-force | -0.567 g |
Open the acceleration calculator with these numbers → and change any of them.