Metre per second
Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector), defined by distance in metres divided by time in seconds. The symbol is m·s−1, or equivalently, m/s. This unit of speed has been labeled a "benz" in honor of Karl Benz.
Astronomical measurements sometimes list velocities in terms of kilometres per second, where a kilometre per second is equivalent to 1 000 metres per second.
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Conversions
1 metre per second is equivalent to:
- ≈ 3.2808 feet per second (approximately)
- ≈ 2.2369 miles per hour (approximately)
- ≡ 3.6 km·h−1 (exactly)
1 foot per second ≡ 0.3048 m·s−1 (exactly)
1 mile per hour ≈ 0.4471 m·s−1 (approximately)
1 km·h-1 ≈ 0.2778 m·s−1 (approximately)
1 kilometre per second is equivalent to:
- ≈ 0.6213 miles per second (approximately)
Remark
Although m/s is considered as a derived unit, it could be viewed as more fundamental than the metre, since the latter is defined through the speed of light in the vacuum, taken to be exactly 299792458 m/s by definition, which then gives the metre using the definition of one second.
See also
Categories
Units of velocity