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Metre per hour (American spelling: meter per hour) is a metric unit of both speed and velocity (Vector (geometry)). Its symbol is m/h or m·h −1 (not to be confused with the imperial unit symbol mph). By definition, an object travelling at a speed of 1 m/h for an hour would move 1 metre.
The following is a list of speed records for various types of vehicles.This list only presents the single greatest speed achieved in each broad record category; for more information on records under variations of test conditions, see the specific article for each record category.
Abbreviations for "kilometres per hour" did not appear in the English language until the late nineteenth century. The kilometre, a unit of length, first appeared in English in 1810, [9] and the compound unit of speed "kilometers per hour" was in use in the US by 1866. [10] "Kilometres per hour" did not begin to be abbreviated in print until ...
The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).
Using this equation for an average speed of 80 kilometres per hour on a 4-hour trip, the distance covered is found to be 320 kilometres. Expressed in graphical language, the slope of a tangent line at any point of a distance-time graph is the instantaneous speed at this point, while the slope of a chord line of the same graph is the average ...
In 2020, previous results are confirmed for the year 2019: mean car speed was reduced between 2.9 and 3.9 km/h, while mean speed of trucks was reduced by 2 km/h without speed limit change. By the same time, fatalities were reduce by 125 in the second semester 2018, by 84 in the first semester 2019, and 127 for the second semester 2019. [127]
The metre per second is the unit of both speed (a scalar quantity) and velocity (a vector quantity, which has direction and magnitude) in the International System of Units (SI), equal to the speed of a body covering a distance of one metre in a time of one second.
40: 140: 90: 1.3 × 10 −7: Typical peak speed of a local service train (or intercity on lower standard tracks). 40.05: 144.17: 89.59: 1.335 × 10 −7: Land speed record for a human powered vehicle. [14] 54: 195: 122: 1.8 × 10 −7: Maximum speed a human can attain during a face-down free-fall. 67: 240: 149: 2.2 × 10 −7: The top speed of ...