Километър в час

Километър в час е извънсистемна мерна единица за скорост. Означава се с km/h или km·h−1. По определение обект, движещ се с 1 km/h, изминава за 1 час разстояние от 1 километър.

  • 3,6 km/h ≡ 1 m/s
  • 1 km/h ≈ 0,27778 m/s
  • 1 km/h ≈ 0,62137 mph

Примери за скорости в km/h

5 km/h Средна скорост на ходене[1][2]
15 –18 km/h Нормално движение с велосипед
37,52 km/h Максимална скорост на бягащ човек (200 m за 19,19 секунди – Юсейн Болт на финала на 200 m гладко бягане на олимпийските игри в Пекин през 2008 г.)
40 – 45 km/h Ограничение на скоростта в жилищни райони
Максимална скорост на бягаща котка или куче
80 – 90 km/h Ограничение на скоростта по главни пътища
Максимална скорост на антилопа
130 – 140 km/h Ограничение на скоростта по автомагистрала
Максимална скорост на гепард
300 km/h Високоскоростен влак
1000 km/h Нормална скорост на голям пътнически самолет
1200 km/h Приблизителна скорост на звука (на морското равнище)
1228 km/h Настоящ световен рекорд за движение по повърхността на Земята
26 000 km/h Скорост на навлизане в атмосферата на космическа совалка
40 320 km/h Втора космическа скорост на повърхността на Земята
107 219 km/h Орбитална скорост на Земята около Слънцето
781 000 km/h Орбитална скорост на Слънцето около центъра на Млечния път
1 079 252 848,8 km/h Скорост на светлината

Източници

  1. ↑ Табличные значения скорости движения пешеходов // dtp-profi.ru. Посетен на 2019-02-06.
  2. ↑ Browning, R. C., Baker, E. A., Herron, J. A. and Kram, R. Effects of obesity and sex on the energetic cost and preferred speed of walking // Journal of Applied Physiology 100 (2). 2006. DOI:10.1152/japplphysiol.00767.2005. с. 390 – 398. Архивиран от оригинала на 2017-12-02.

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