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Metre per second

From Wikipedia, the free encyclopedia
(Redirected fromKm/s)
SI derived unit of speed and velocity
"m/s" redirects here. For other uses, seem/s (disambiguation).
Metre per second
Unit systemSI
Unit ofspeed
Symbolm/s
Conversions
1 m/sin ...... is equal to ...
   km/h   3.6
   mph   2.2369
   kn   1.9438
   ft/s   3.2808

Themetre per second is the unit of bothspeed (ascalar quantity) andvelocity (avector quantity, which has direction and magnitude) in theInternational System of Units (SI), equal to the speed of a body covering adistance of onemetre in a time of onesecond. According to the definition of metre,[1]1 m/s is exactly1299792458{\textstyle {\frac {1}{299792458}}} of thespeed of light.

TheSI unit symbols arem/s,m·s−1,m s−1, or⁠m/s⁠.[2]

Conversions

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1 m/s is equivalent to:

= 3.6km/h (exactly)[3]
≈ 3.2808feet per second (approximately)[4]
≈ 2.2369miles per hour (approximately)[5]
≈ 1.9438knots (approximately)[6]

1foot per second =0.3048 m/s (exactly)[7]

1mile per hour =0.44704 m/s (exactly)[8]

1 km/h =0.27 m/s (exactly)[9]

Relation to other measures

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Thebenz, named in honour ofKarl Benz, has been proposed as a name for one metre per second.[10] Although it has seen some support as a practical unit,[11] primarily from German sources,[10] it was rejected as the SI unit of velocity[12] and has not seen widespread use or acceptance.[13]

The square of metres per second, orsquare metre per square second, is used as a unit ofgravitational potential.

Unicode character

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The "metre per second" symbol is encoded byUnicode at code pointU+33A7 ㎧SQUARE M OVER S.[14]

See also

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References

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  1. ^"Definitions of the SI base units".physics.nist.gov. 29 May 2019. Retrieved8 February 2022.
  2. ^"SI brochure, Section 5.1". Archived fromthe original on 2019-03-21. Retrieved2018-06-08.
  3. ^CDX Automotive (2013).South African Automotive Light Vehicle Level 3. Jones & Bartlett Learning. p. 478.ISBN 978-1449697853.
  4. ^Dinçer, İbrahim; Rosen, Marc A. (2007).EXERGY: Energy, Environment and Sustainable Development. Amsterdam: Elsevier. p. 444.ISBN 9780080531359.OCLC 228148217.
  5. ^Jazar, Reza N. (2017).Vehicle Dynamics: Theory and Application (3. ed.). Cham, Switzerland: Springer. p. 957.ISBN 9783319534411.OCLC 988750637.
  6. ^Collinson, R.P.G. (2013).Introduction to Avionics Systems (2. ed.). Boston: Springer Science & Business Media. p. 16.ISBN 9781441974662.OCLC 861706692.
  7. ^Potter, Merle C; Wiggert, David C; Ramadan, Bassem H. (2016).Mechanics of Fluids, SI Edition (5. ed.). Cengage Learning. p. 722.ISBN 978-1305887701.
  8. ^Das, Braja M.; Kassimali, Aslam; Sami, Sedat (2010).Mechanics for Engineers: Statics. Ft. Lauderdale, FL: J. Ross Publishing. p. 556.ISBN 9781604270297.OCLC 419827343.
  9. ^Wright, Gus (2015).Fundamentals of medium/heavy duty diesel engines. Burlington, Massachusetts: Jones & Bartlett Publishers. p. 1349.ISBN 9781284067057.OCLC 927104266.
  10. ^abKlein HA. (2011).The Science of Measurement: A Historical Survey. Dover Publications. p. 695.ISBN 978-0486258393.
  11. ^Heijungs R. (2005). "On the Use of Units in LCA".The International Journal of Life Cycle Assessment.10 (3): 174.Bibcode:2005IJLCA..10..173H.doi:10.1065/lca2005.02.199.S2CID 110961104.
  12. ^Cardarelli F. (2004).Encyclopaedia of Scientific Units, Weights and Measures: Their SI Equivalences and Origins. Transl. by MJ Shields. (3rd revised ed.). Springer. p. 217.ISBN 978-1852336820.
  13. ^Dresner S. (1974).Units of Measurement: An Encyclopaedic Dictionary of Units Both Scientific and Popular and the Quantities They Measure. Harvey Miller and Medcalf. p. 13.ISBN 978-0-85602-036-0.
  14. ^Unicode Consortium (2019)."The Unicode Standard 12.0 – CJK Compatibility ❰ Range: 3300—33FF ❱"(PDF).Unicode.org. RetrievedMay 24, 2019.

External links

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