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Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.
1.15078 miles per hour (approximately), 20.25372 inches per second (approximately) 1.68781 feet per second (approximately). The length of the internationally agreed nautical mile is 1 852 m. The US adopted the international definition in 1954, having previously used the US nautical mile (1 853.248 m). [6]
Pace [6] in minutes per kilometre or mile vs. slope angle resulting from Naismith's rule [7] for basal speeds of 5 and 4 km / h. [n 1]The original Naismith's rule from 1892 says that one should allow one hour per three miles on the map and an additional hour per 2000 feet of ascent.
Construction of the jump began in 1937 and was completed in 1938. At the time it was 156 feet (48 m) high. It hosted its first competition in 1939. In 1948, the outrun was dug out, and in 1977 the inrun tower was made larger (to the current 176 feet (54 m)) after a fire. There have been numerous other renovations over the years.
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 record is 44.72 km/h (27.78 mph), measured between meter 60 and meter 80 of the 100 meters sprint at the 2009 World Championships in Athletics by speed. [4] [5] (Bolt's average speed over the course of this race was 37.578 km/h or 23.35 mph.) [6] Compared to quadrupedal animals, humans are exceptionally capable of endurance, but incapable of great speed. [7]
The world record in the mile run is the fastest time set by a runner in the middle-distance track and field event. World Athletics is the official body which oversees the records. Hicham El Guerrouj is the current men's record holder with his time of 3:43.13, [ 1 ] while Faith Kipyegon has the women's record of 4:07.64. [ 2 ]
Hares can reach maximum speeds of 35 mph (56 km/h) [72] in short distances of approximately 90 meters, and a top speed of 50 mph (80 km/h) for about 20 meters. [73] Jackrabbit: 58–72 km/h (36–45 mph) [g] The jackrabbit's strong hind legs allow it to leap 3 m (9.8 ft) in one bound; some can even reach 6 m (20 ft). [82]