Velocity & Acceleration
Velocity unit:
m/s
m/s²
s
Acceleration measures the rate of change of velocity. The SI unit is metres per second squared (m/s²). It appears in Newton's second law (F = ma), vehicle performance specs, and seismology.
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Tip: To convert g-force to m/s²: multiply by 9.80665. A car that goes 0-60 mph in 3 seconds accelerates at about 0.9g.
- 11 g (standard gravity) = 9.80665 m/s²
- 21 ft/s² = 0.3048 m/s²
- 3Common conversions: m/s², ft/s², g-force, Gal (cm/s²)
| Unit | Equivalent in m/s² | Common use |
|---|---|---|
| 1 m/s² | 1 | SI base unit |
| 1 g (gravity) | 9.80665 | Vehicle G-force, aerospace |
| 1 ft/s² | 0.3048 | US/UK engineering |
| 1 Gal (galileo) | 0.01 | Seismology |
| 1 mile/s² | 1,609.34 | Rare — astrophysics |
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Fun Fact
During a sneeze, the head accelerates at about 3g. Fighter pilots can experience up to 9g in tight turns — enough to cause blackout without a G-suit.
References
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