LINE

    Text:AAAPrint
    Sports

    2018 World Cup official ball approved after Swiss tests

    1
    2018-06-03 08:15:56Xinhua Editor : Feng Shuang ECNS App Download

    The official ball for the 2018 World Cup in Russia has been approved after a series of rigorous Swiss scientific tests, standing out as a perfect example of material and applied physics, according to the Swiss Federal Laboratories for Materials Science and Technology (EMPA) on Saturday.

    EMPA has been testing footballs for FIFA for 22 years, and not every ball passes the test. Although some goalkeepers had been critical of the ball's flight characteristics, the Adidas "Telstar 18" has now got the seal of approval.

    According to EMPA, it's not only the circumference and weight of the ball that are measured precisely. Despite being crushed 250 times in a water tank, the ball may only absorb a minimal amount of liquid, and must be able to hold its air and always jump off at the same height when it impacts from a height of two meters.

    To prove that the ball is a perfect sphere, it's also measured at no less than 4,000 points. And finally, the ball must retain its shape even if shot against a steel wall 2,000 times at 50 km per hour.

    The tests were specially developed by EMPA experts in St. Gallen for official tournament footballs.

    Some goalkeepers of various World Cup teams who have already been allowed to test the ball have complained that the ball "flutters."

    It's precisely the surface that is responsible for the unpredictable flight of the ball. Researchers said optics also come into play. Telstar 18 is not made up of the traditional hexagons and pentagons, but of irregular elements with asymmetrical prints. Thus the flying ball can be quite an unusual sight under some lighting conditions.

    Professional players can take advantage of the fact that a football's trajectory is complex and, according to the theory of aerodynamics, sometimes chaotic.

    Unlike a streamlined projectile that describes a perfect parabola, the ball deforms, for example when the player kicks it. Experienced players take advantage of this effect and "bend it like Beckham." This is not actually a matter of magic, but of applied physics, according to the researchers.

      

    Related news

    MorePhoto

    Most popular in 24h

    MoreTop news

    MoreVideo

    News
    Politics
    Business
    Society
    Culture
    Military
    Sci-tech
    Entertainment
    Sports
    Odd
    Features
    Biz
    Economy
    Travel
    Travel News
    Travel Types
    Events
    Food
    Hotel
    Bar & Club
    Architecture
    Gallery
    Photo
    CNS Photo
    Video
    Video
    Learning Chinese
    Learn About China
    Social Chinese
    Business Chinese
    Buzz Words
    Bilingual
    Resources
    ECNS Wire
    Special Coverage
    Infographics
    Voices
    LINE
    Back to top Links | About Us | Jobs | Contact Us | Privacy Policy
    Copyright ?1999-2018 Chinanews.com. All rights reserved.
    Reproduction in whole or in part without permission is prohibited.
    主站蜘蛛池模板: 尼勒克县| 千阳县| 屏南县| 从江县| 当阳市| 佳木斯市| 西乌珠穆沁旗| 浠水县| 昌都县| 湄潭县| 介休市| 白河县| 漳州市| 广水市| 承德县| 龙南县| 当涂县| 平和县| 河源市| 项城市| 远安县| 峡江县| 阿鲁科尔沁旗| 阳山县| 伊春市| 泰顺县| 磴口县| 疏勒县| 栖霞市| 古交市| 盐源县| 诸暨市| 临高县| 沭阳县| 旬邑县| 金秀| 安乡县| 玛纳斯县| 芮城县| 辽中县| 芜湖县|