A major-league pitcher can throw a baseball in excess of 41.0m/s.If a ball is thrown horizontally at
题目
A major-league pitcher can throw a baseball in excess of 41.0m/s.If a ball is thrown horizontally at this speed,how much will it drop by the time it reaches a catcher who is 17.0m away from the point of release?
答案
这个问题说的是一个职业联赛的棒球投手能以41米每秒的速度抛出棒球,当他水平的将球抛出到离他17米远的接手时,这个球下降的高度是多少?
球运行的时间t＝17/41,球下降的高度h＝1/2*g*t^2=1/2*10*(17/41)^2,用计算器算出来就行了
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