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同学们都观看过田径比赛吧?在400米及以上的中长跑中,所有运动员的起跑线都不在同一条直线上,这是什么原因呢?公平吗?国际田联规定标准的体育跑道内圈周长约400米,其中由长84.389米的两个直道和半径为36.5米的两个半圆连接而成。举行400米跑比赛时,运动员都要经过弯道,于是跑外圈的运动员在弯道处要比跑内圈的运动员多跑一些距离,为了消除这个差距,就采取了在起跑时让运动员处于不同的起跑线上。首先考虑第一道(最里道)的起点。假设有8条跑道,每条跑道的宽为1.22米。按规定,第一道的全程应由离开内圈30厘米处沿跑圈丈量,所以第一道全长为2×3.14×
Have the classmates watched the track and field competition? In the 400 meters and above, the starting line for all the athletes is not on the same straight line. What is the reason? Fair? The IAAF stipulates that the standard sports track inner circle About 400 meters long, of which 84.389 meters long by two straight and 36.5 meters radius of the two semicircles connected. In a 400-meter run, the athletes go through the corners, so the athlete who runs the outer ring runs a little more at the curve than the athlete who runs the inner ring. In order to eliminate this disparity, Different starting line. First consider the first (most miles) starting point. Suppose there are 8 runways, each with a width of 1.22 meters. According to regulations, the first full journey should be measured 30 centimeters away from the inner circle along the runway, so the first full length is 2 × 3.14 ×