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A radar speed gun, also known as a radar gun, speed gun, or speed trap gun, is a device used to measure the speed of moving objects. It is commonly used by police to check the speed of moving vehicles while conducting traffic enforcement , and in professional sports to measure speeds such as those of baseball pitches , [ 1 ] tennis serves , and ...
This article lists the fastest record serve speeds for men's and women's professional tennis. The fastest recorded serve is by Sam Groth , at 263.4 km/h (163.7 mph) at a Challenger event. [ 1 ] The fastest recorded serve at an ATP event was by John Isner , at 253.0 km/h (157.0 mph) in the first round of the 2016 Davis Cup .
Hawk-Eye camera system at the Kremlin Cup tennis tournament on 20 October 2012, Moscow. Hawk-Eye is a computer vision system used to visually track the trajectory of a ball and display a profile of its statistically most likely path as a moving image. [1]
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The projectile is fired by compressed air from a small launcher on the front grille of a police car. [3] The deploying vehicle must be within 25 feet (7.6 m) range of the offending vehicle. [4] The tracking signal location is then monitored from a dispatcher's computer screen.
Screen sports is expanding its application range by combining IT with the simulation industry. [1] Virtual reality (VR) technology has developed dramatically and 'screen sports' has gained popularity, and people's hobbies are also changing. The advantage is that you can enjoy sports without restriction of space, equipment, seasons and weather. [2]
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Originally the tennis ball consisted of rough cloth strips tightly bound together. Eventually the cloth strips became the core, wrapped in twine and covered by a finer cloth or felt hand-stitched around it. [6] In 1972, at the request of Lamar Hunt to televise World Championship Tennis, the tennis ball was manufactured with the optic yellow ...