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随着体育与科学的日益紧密结合,越来越多的运动之谜正在揭开。掷铁饼中的“椭球体现象”有—位南方的运动员,在当地进行铁饼训练时,突破了70米纪录。但当他来到北国冰城哈尔滨比赛时,尽管他作了很大的努力,却只掷出69.2米。可是回到广州以后,一下子又突破了70米大关,原因何在?这种现象其实是地球开的“玩笑”。因为地球是一个两极稍扁,赤道略膨的椭球体。它的扁率即长半轴 a 与短半轴 b 之差和长半轴之比:(a-b)/a 为1:298.25,因此,它的重力加速度从赤道至两极存在着由小到大的变化,所以出现了上述现象。
As sports and science become more closely integrated, more and more mysteries of sports are unraveling. The “ellipsoid phenomenon” in discus throwing - a player in the south who broke the 70-meter record when performing discus training locally. However, when he came to the Northland ice city of Harbin, despite his great efforts, only throw 69.2 meters. But after returning to Guangzhou, once again broke through the 70-meter mark, the reason why? This phenomenon is actually the earth’s “joke.” Because the Earth is a slightly flattened bipolar ellipsoid slightly equatorial. Its oblateness, the ratio of the difference between the major axis a to the minor axis b, and the ratio of the major axis to the minor axis (ab) / a, is 1: 298.25, so that its gravitational acceleration ranges from the equator to the poles with ascending Change, so there has been the above phenomenon.