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The following progression of low-altitude records therefore starts with Hines's low-altitude "record" when the IAAF started to recognise only electronic timing in 1977, and continues to Lewis's low-altitude performance that equalled the high-altitude world record in 1987. (Ben Johnson's 9.95 run in 1986 and 9.83 run in 1987 are omitted.)
Sergey Bubka's 1993 pole vault world indoor record of 6.15 m was not considered to be a world record, because it was set before the new rule came into effect. Bubka's world record of 6.14 m, set outdoors in 1994, was surpassed by six consecutive records set indoors, most recently by Armand Duplantis in 2023 with a 6.22 m mark. In 2020 ...
Gay finished with a time of 9.71 s, 0.02 s off Bolt's 9.69 s world-record run in Beijing. [144] [145] Bolt addresses the press in the Mixed Zone at the 2009 IAAF World Championships. Although Gay withdrew from the second race of the competition, Bolt once again produced world record-breaking time in the 200 metres final.
The men's world record has been improved upon twelve times since electronic timing became mandatory in 1977. [15] The current men's world record of 9.58 s is held by Usain Bolt of Jamaica, set at the 2009 World Athletics Championships final in Berlin, Germany on 16 August 2009, breaking his own previous world record by 0.11 s. [16]
The Jamaican sprinter Usain Bolt produced a maximum of 3.5 hp (2.6 kW) 0.89 seconds into his 9.58 second 100-metre (109.4 yd) sprint world record in 2009. [15] [failed verification] In 2023 a group of engineers modified a dynometer to be able to measure how much horsepower a horse can produce. This horse was measured to 5.7 hp (4.3 kW). [16]
The closed bolt firing cycle made the M2 usable as a synchronized machine gun on aircraft before and during World War II, as on the early versions of the Curtiss P-40 fighter. The M2 is a scaled-up version of John Browning's M1917 .30 caliber machine gun.
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