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Home > Kilometre per second

kilometre per second is an SI derived unit of both speed (scalar) and velocity (vector), signified by the symbol km/s or km s-1. It is equal to 1,000 m/s.

1 km/s is about the top speed of a sub-orbital spacecraft.

A typical value for the specific impulse of current rockets is 4.5 km/s.

See also

SI derived units of velocity

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Topics: Kilometre Per Second, Kilometre Per Hour...

KilometreA kilometre ( American spelling: kilometer (symbol: km is a unit of length equal to 1000 metres. It is approximately equal to 0. 621 miles, 1094 yards or 3281 feet. Slang terms for kilometre include " klick" (or "click") and "kay". Click" is also used forKilometre per hourKilometre per hour ( U. spelling: kilometer per hour is a unit of both speed ( scalar) and velocity ( vector). The abbreviation is km/h or km·h-1 although the unit is sometimes written colloquially as kph kmph or km/hr . An object travelling at a speed ofKilometre per secondkilometre per second is an SI derived unit of both speed (scalar) and velocity (vector), signified by the symbol km/s or km s-1 . It is equal to 1,000 m/s. 1 km/s is about the top speed of a sub-orbital spacecraft. A typical value for the specific impulse
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