# How fast is 55 kilometers per hour?

It's about nine-tenths as fast as Secretariat
The speed of Secretariat is about 60.50 kilometers per hour.
(at Belmont Stakes, 1973)
Setting a record finish, Secretariat ran the Belmont Stakes — a 12 furlong race length — in 2:24, for an average speed of 60.4 kph in 1973. His margin of victory in the race, also a record-setter, was 31 lengths.
It's about four-fifths as fast as a Gazelle
The speed of a Gazelle is about 70 kilometers per hour.
(for Thomson's Gazelle, a.k.a. Eudorcas thomsoni, a.k.a. "Tommie", a.k.a. "Tommy")
A Thomson's gazelle can reach speeds of up to 80 kph. The gazelle's speed doesn't match that of its chief predator, the cheetah, but a gazelle's endurance usually ensures an escape in distances greater than 500 m (0.3 mi).
It's about four-fifths as fast as a Hare
The speed of a Hare is about 70 kilometers per hour.
(for European Brown Hare, a.k.a. Brown Hare, a.k.a. Lepus europaeus, a.k.a. Brown Hare)
The European Hare can run at speeds of up to 72 kph. While speed is a factor in their escapes, hares evade their chief predators — wolves, foxes, and golden eagles — by fleeing in a zigzag pattern.
It's about three-fourths as fast as a Greyhound
The speed of a Greyhound is about 72.40 kilometers per hour.
(a.k.a. English greyhound) (approximate maximum speed)
Greyhounds reach average race speeds of 72.4 kph. Despite their racing prowess, greyhounds are not considered energetic dogs — the typical greyhound race requires the dogs to run for less than 35 seconds.
It's about one-and-a-half times as fast as Michael Johnson
The speed of Michael Johnson is about 37.260 kilometers per hour.
(a.k.a. Michael Duane Johnson) (sprinter; 1967-) (at the Atlanta Olympics, 1996)
Setting a record that stood for 12 years, Michael Johnson ran a 200 m in 0:19.32 for an average speed of 37.27 kph at the 1996 Olympics. Johnson was nicknamed "the Man with the Golden shoes" in recognition of the custom footwear worn during these races — a pair of Nikes with a left size of 10.5 and a right size of 11.
It's about one-and-a-half times as fast as Usain Bolt
The speed of Usain Bolt is about 37.10 kilometers per hour.
(at the Beijing Olympics, 2008) (a.k.a. Usain St. Leo Bolt, OJ, C.D.) (sprinter; 1986-)
Setting a world record, Usain Bolt ran a 100 m in 0:09.69 for an average speed of 37.2 kph at the 2008 Olympics. Furthermore, Bolt's margin of record breaking — 0.03 s — is the largest margin of victory in the history of digital measurements.
It's about one-and-three-fifths times as fast as Flo-Jo
The speed of Flo-Jo is about 33.740 kilometers per hour.
(at the Seoul Olympics, 1998) (a.k.a. Florence Griffith-Joyner, a.k.a. Florence Delorez Griffith) (swimmer; 1959-1998)
Setting a world record in 1988, Flo-Jo ran a 200 m in 0:21.34 for an average speed of 33.74 kph. Known as a 200 m runner, Joyner also set a record time in a 100 m race at in 1987.
It's about half as fast as a Knuckleball (baseball)
The speed of a Knuckleball (baseball) is about 110 kilometers per hour.
(a.k.a. knuckler, a.k.a. floater, a.k.a. dancer, a.k.a. butterfly ball) (major league average)
The average speed of major league knuckleball pitch is 110 kph. Eddie Cicotte, who was later implicated in the 1919 Black Sox scandal, is credited with developing the pitch ca. 1906.
It's about half as fast as a Cheetah
The speed of a Cheetah is about 110.50 kilometers per hour.
(Acinonyx jubatus)
The cheetah can reach speeds of up to 101 - 120 km/h in short bursts. From a crouching position, the cheetah can attain these speeds in just 2.25 seconds.
It's about two times as fast as Noah Ngeny
The speed of Noah Ngeny is about 27.280 kilometers per hour.
(in Rieti, Italy; 1999) (sprinter; 1978-)
Setting a world record at the Rieti Grand Prix in 1999, Noah Ngeny ran 1,000 m in 2:11.96 for an average speed of 27.28 kph. According to some reports, Ngeny did not begin running competitively until just three years before setting the record.
It's about half as fast as a Hurricane
The speed of a Hurricane is about 119 kilometers per hour.
(formally: Topical cyclone; a.k.a. typhoon)
A hurricane is defined by the US National Hurricane Center as a Northern Hemisphere tropical storm having one-minute average wind-speeds of at least 119 kph. Typhoons Tip (October, 1979) and Keith (October, 1997) and Hurricanes Camille (August, 1969) and Allen (August, 1980) jointly hold the record for highest tropical storm wind speeds at 310 kph (192.63 mph).
It's about half as fast as a Curveball (baseball)
The speed of a Curveball (baseball) is about 120 kilometers per hour.
(a.k.a. hook, a.k.a. hammer, a.k.a. yakker) (major league average)
The average speed of major league curveball pitch is 120 kph. In the 1940's, debate over whether there really was a curve in the curveball pitch was settled with the conclusion that the ball does curve; however, an optical illusion caused by the spin of the ball and the batter's perception of motion exaggerates the extent of the curve.
It's about two-and-a-half times as fast as a Bull
The speed of a Bull is about 24 kilometers per hour.
(for animals involved in the Running of the Bulls, a.k.a. Encierro, San Fermin, Pamplona, Spain) (herd average speed)
The herd of the annual Encierro in Pamplona, Spain runs at an average speed of 24 kph. The Encierro is run annually from July 7th through July 14th and involves 42 bulls, 77 oxen, and an estimated 17,000 runners over the course of the event.
It's about two-fifths as fast as a Fastball (baseball)
The speed of a Fastball (baseball) is about 150 kilometers per hour.
(a.k.a. rising fastball, a.k.a. cross-seam fastball, a.k.a. heater, a.k.a. hummer, a.k.a. smoker; for four-seam grip) (major league average)
The average speed of major league fastball pitch is 150 kph. When up against the quickest professional fastball pitchers, a batter may have less than 0.4 seconds to react to a pitched ball.
It's about three-tenths as fast as a Skydiver (belly-to-earth)
The speed of a Skydiver (belly-to-earth) is about 190 kilometers per hour.
(Belly-to-Earth orientation, average conditions, terminal velocity)
A belly-to-Earth oriented skydiver's terminal velocity is about 190 kph. In a typical jump from 3,900 m (13,000 ft), a diver in this orientation will be in freefall for 60 seconds.

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