# Metre per second

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Metre per second

Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds.

The official SI symbolic abbreviation is m·s−1, or equivalently either m/s or $\tfrac{\mbox{m}}{\mbox{s}}$.[1] Where metres per second are several orders of magnitude too slow to be convenient, such as in astronomical measurements, velocities may be given in kilometres per second, where 1 km/s is 1000 metres per second.

## Conversions

1 m/s is equivalent to:

= 3.6 km·h−1 (exactly)
≈ 3.2808 feet per second (approximately)
≈ 2.2369 miles per hour (approximately)
≈ 1.9438 knots (approximately)

1 foot per second = 0.3048 m·s−1 (exactly)

1 mile per hour = 0.44704 m·s−1 (exactly)

km·h-1 ≈ 0.2778 m·s−1 (approximately)

1 kilometre per second is equivalent to:

≈ 0.6213 miles per second (approximately)
≈ 2237 miles per hour (approximate)

## Relation to other measures

Although m·s−1 is an SI derived unit, it could be viewed as more fundamental than the metre, since the latter is derived from the speed of light in a vacuum, which is defined as exactly 299 792 458 m·s−1 by the BIPM.[2] It follows that one metre is the length of the path travelled by light in a vacuum during a time interval of 1/299 792 458 of one second.

## References

Wikimedia Foundation. 2010.

### Look at other dictionaries:

• metre per second — metras per sekundę statusas T sritis Standartizacija ir metrologija apibrėžtis Greičio, fazinio ir grupinio greičio, elektromagnetinių bangų greičio, akimirkinio garsinio dalelių greičio, garso greičio matavimo vienetas: m/s. atitikmenys: angl.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• Metre per second — …   Википедия

• Metre per second squared — The metre (or meter) per second squared is the unit of acceleration in the International System of Units (SI). As a derived unit it is composed from the SI base units of length, the metre, and the standard unit of time, the second. Its symbol is… …   Wikipedia

• metre per second squared — metras per sekundę kvadratu statusas T sritis Standartizacija ir metrologija apibrėžtis Pagreičio, laisvojo kritimo arba gravitacijos pagreičio, akimirkinio garsinio dalelių pagreičio matavimo vienetas: m/s². atitikmenys: angl. metre per second… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• Cubic metre per second — A cubic metre per second (m3⋅s−1, m3/s, cumecs or cubic meter per second in American English) is a derived SI unit of flow rate equal to that of a stere or cube with sides of one metre ( 39.37 in) in length exchanged or moving each second. It is… …   Wikipedia

• cubic metre per second — m3/s rate of discharge, typically used in measuring streamflow. One cubic metre per second is equal to the discharge in a stream of a cross section one metre wide and one metre deep, flowing with an average velocity of one metre per second …   Dictionary of ichthyology

• cubic metre per second — kubinis metras per sekundę statusas T sritis Standartizacija ir metrologija apibrėžtis Tūrio srauto, akimirkinio tūrinio garso srauto, rekombinacijos koeficiento matavimo vienetas: m³/s. atitikmenys: angl. cubic metre per second vok. Kubikmeter… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• square metre per second — kvadratinis metras per sekundę statusas T sritis Standartizacija ir metrologija apibrėžtis Difuzijos koeficiento, kinematinės klampos koeficiento ar kinematinės klampos, temperatūrinio laidžio matavimo vienetas: m²/s. atitikmenys: angl. square… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• reciprocal cubic metre per second — atvirkštinis kubinis metras sekundei statusas T sritis Standartizacija ir metrologija apibrėžtis Lėtinimo tankio matavimo vienetas: m⁻³/s. atitikmenys: angl. reciprocal cubic metre per second rus. обратный кубический метр обратная секунда ryšiai …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• Metre per hour — (American spelling: meter per hour) is a metric unit of both speed (scalar) and velocity (Vector (geometry)). Its symbol is m/h or m·h−1 (not to be confused with the imperial unit symbol mph. By definition, an object travelling at a speed of 1… …   Wikipedia

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