# speed (motion)

how much motion occurs per unit of time

- Computed level: L6 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: physics  ·  Arena: measurement

## Emergence
**Emerges from:** [motion](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-motion.movement), [time](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-time.dimension), [occurs](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-occurs.event), [per](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-per.ratio), [unit](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-unit.measurement)

**Through:** motion occurs across time, producing a rate of change

**Novel properties:**
- rate of change
- quantified motion
- temporal intensity

## Examples
- The International Space Station orbits Earth at 7.66 km/s, completing 15.5 revolutions per day. *(physics)*
- Usain Bolt reached 44.72 km/h during his 100-meter world record of 9.58 seconds in Berlin. *(sports)*
- The Japanese Shinkansen Nozomi trains travel up to 300 km/h along the Tokaido line between Tokyo and Osaka. *(engineering)*

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-speed.motion*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-speed.motion.json*  
*Every definition provably resolves to space, time, energy and pattern.*