从生物学角度来看,身体对刺激的反应速度有限。音频刺激和视觉刺激之间的时间存在差异。从技术上讲,我们对视频刺激的响应速度要快于视觉刺激,0.14秒与0.18秒相比。因此,如果你可以通过听到球拍的方式来解决所有关于击球的问题,那么你比其他曾经打过乒乓球的人要快0.04或四分之一秒。优秀的球员(即使是像我这样的普通球员)仍然可以推断出对手正在做的很多事情,只需听听球接触球棒时的噪音。例如,球棒上的球刷声告诉你旋转已经放在球上,击中一个环就会产生这种效果。一个更尖锐的“痘疤”会告诉你球已经被打得非常牢固,并且还会告诉你他们正在使用薄橡胶。当然,要求查看反对派的蝙蝠是合法的,因此倾听噪音来说明使用的橡胶厚度只是可以做到的事情。有人说,当球击中桌子时,他们可以判断球是旋转还是旋转。就个人而言,我不能,但精英玩家可以不会让我感到惊讶。在乒乓球中,对击球作出反应的平均总时间通常约为0.25秒。通过大量的培训和大量的练习,这可以减少到0.18秒。这是将乒乓球运动员与顶级A级运动员分开的重要因素之一。在这项运动的精英级别中,即使是一秒钟中最小的一小部分(1/1000),也会开始发挥作用。扭矩是在以固定点周围的角度施加时发生的力。这通常是一个圆圈。有几个地方我见过Torque在乒乓球比赛中使用过。一些常见的地方是:最大化球的旋转。通过这样做,球体(球)围绕其内部的一个点旋转。这意味着球旋转得越快,扭矩越高。在打击强力射击时解开身体,例如粉碎。你放松你的臀部,然后是你的躯干,然后你的肩膀,上臂,下臂和最后的手腕。这增加了挥杆的半径。通过将球击向球拍的外缘也将增加半径。我不知道这是否在游戏中使用,因为这样做意味着球击打最佳位置外的球拍并导致失去控制。当服务正手摆锤时,一种技术是通过最小化球上的旋转量来欺骗对手。这是通过将球接近手柄来完成的,从而最小化挥杆的半径。 技术上更加努力地击球(速度更快)也会增加扭矩,因为速度的增加会导致球的加速度直接增加。当F = ma时,a的增加导致F的直接增加,这反过来导致扭矩的直接增加。

新加坡南洋理工物理Assignment代写:运动中的物理与数学

From a biological perspective, there are limits to how fast the body can react to a stimulus. There is a difference in this time between an audio stimulus and visual stimulus. Technically we respond faster to an audio stimulus than a visual stimulus, 0.14 of a second compared with 0.18 of a second respectively. Therefore, if you can work out EVERYTHING about the shot you need to just by hearing it strike the racket, you’re 0.04 or four one hundredths of a second faster than anyone else who has ever played table tennis before. Good players (even average players like myself) can still deduce a lot of what the opposition is doing, simply by listening to the noise the ball makes when it contacts the bat. For instance a brushing noise of the ball on the bat tells you that spin has been put on the ball, hitting a loop will give this effect. A sharper ‘pock’ will tell you that the ball has been struck quite solidly, and will also tell you that they’re using a thin rubber. It is, of course, legal to ask to view the opposition’s bat, so listening to the noise to tell what thickness rubber is being used is just something that can be done. Some people say that when the ball strikes the table they can tell whether the ball is top spun or under spun. Personally, I can’t, but it wouldn’t surprise me that elite players can. In Table Tennis, the average total time to react to a shot is usually around 0.25 of a second. With lots of training and lots of practice, this can be reduced to 0.18 of a second. This is one of the big factors in what separates the greats of table tennis, from the top A grade players. In elite levels of the sport, even being the smallest fraction of a second (1/1000ths) faster starts to make a difference. Torque is a Force that occurs when it is applied at an angle around a fixed point. This is usually a circle. There are several places that I’ve seen Torque used in Table Tennis. Some common places are: Maximizing the spin on the ball. By doing this a sphere (the ball) is rotated about a point inside it. This means that the faster the ball is spinning the higher the Torque. Unwinding the body when playing a powerful shot such as a smash. You unwind your hips, then your torso, then your shoulders, upper arm, lower arm and finally wrist. This increases the Radius of the swing. By hitting the ball toward the outer rim of the racket will also increase the radius. I don’t know if this is used in the game, as doing this would mean the ball is striking the racket outside of the sweet spot and causing a loss of control. When serving a forehand pendulum serve, one technique is to trick the opponent by minimizing the amount of spin put on the ball. This is done by contacting the ball close to the handle, thereby minimizing the Radius of the swing.
Technically hitting the ball harder (with a higher velocity) also increases the Torque, as this increase in velocity results in a direct increase in the acceleration of the ball. As F = ma, an increase in a leads to a direct increase in F, which in turn leads to a direct increase in Torque.

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