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如果你爱看足球比赛，那么你一定知道贝克汉姆，也一定知道他的任意球。贝克汉姆的任意球路线就像香蕉一样，能绕过人墙，最后钻入球门，使对方守门员望球兴叹。 那么，为什么足球在空中能拐弯，“香蕉球”是如何踢出来的，其奥秘何在? 要揭开这个谜，就要用到我们学习的大气压，同时还要考虑运动员的技艺。我们从球员踢球的那一瞬间和足球在空中飞行时的受力情况分析。 如果球员在踢球时踢在球重心的右侧，球将按逆时针方向旋转，如图所示(俯视)，球在空中向左偏转。反之，球向右偏转。
If you love to watch football, then you must know Beckham and he must know his free kick. Beckham’s free kick course is like a banana, can bypass the wall, and finally drilled into the goal so that the other goalkeeper stared at the ball. So why can football turn in the air and how does the “banana ball” kick out? What is the mystery? To unveil this mystery, we must use the atmospheric pressure we learn, and we must also consider the skills of the athletes. We analyze the moments when the players played and the force conditions when the football was flying in the air. If the player kicks the ball to the right of the ball’s center of gravity when he kicks the ball, the ball will rotate counterclockwise. As shown (top view), the ball is deflected to the left in the air. On the contrary, the ball is deflected to the right.