MILE and KILOMETRE - SPEEDS
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Miles per hour is a unit of speed, expressing the number of international miles covered per hour. The common abbreviation in everyday use is mph, although mi/h, using the SI method of expressing derived units, is sometimes used, especially in the United States. The preferred SI unit for velocity is m/s (metres per second), although km/h or kph is often used as a replacement for mph.
When calculating how fast - this will help
1 mph is equal to:
Miles per hour is the unit used for speed limits on roads in the US and Britain.
Examples of speeds in mph
Kilometre per hour (American spelling: kilometer per hour) is a unit of both speed (scalar) and velocity (vector). The correct SI symbol is km/h or km·h−1, although the unit is sometimes written colloquially as kph, kmph, or km/hr. None of these corruptions is correct under the rules of SI in reference to correct style when using symbols. It is often spoken and sometimes written as klicks or kays in slang usage.
By definition, an object travelling at a speed of 1 km/h for an hour would move 1 kilometre.
Examples of speeds in km/h
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