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The first equation shows that, after one second, an object will have fallen a distance of 1/2 × 9.8 × 1 2 = 4.9 m. After two seconds it will have fallen 1/2 × 9.8 × 2 2 = 19.6 m; and so on. On the other hand, the penultimate equation becomes grossly inaccurate at great distances.
She ran the 800 meters at the 2012 United States Olympic Trials and placed 18th, and also ran at the 2012 World Junior Championships in Athletics, where she broke the American high school girl's outdoor record in the 1500 m with a 4:11.01, surpassing the record of Jordan Hasay in the 2008 United States Olympic Trials by over 3 seconds.
10.2 meters – length of the Panzer VIII Maus, the world's largest tank; 12 meters – height of the Newby-McMahon Building, the world's littlest skyscraper; 23 meters – height of Luxor Obelisk, located in the Place de la Concorde, Paris, France; 25 meters – wavelength of the broadcast radio shortwave band at 12 MHz
In terms of judging a person's speed, the best method of timing is through lasers which start and stop the times when passed through. A laser start (from a stationary position) is more accurate for measuring pure speed as it does not register a runner's reaction time, however, this method of timing a 40-yard dash can affect the accuracy by as much as 0.5 seconds with the manual stopwatch method.
Height measurement using a stadiometer. Human height or stature is the distance from the bottom of the feet to the top of the head in a human body, standing erect.It is measured using a stadiometer, [1] in centimetres when using the metric system or SI system, [2] [3] or feet and inches when using United States customary units or the imperial system.
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On 12 September 1979, he won the 200 metres with a time of 19.72. [4] His time set a new world record, beating Tommie Smith's time of 19.83 set on the same track in the 1968 Summer Olympics. [4] The record held for almost seventeen years before Michael Johnson broke it at the 1996 U.S. Olympic Trials. [4]
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