为什么跑步项目跑步方向是逆时针的呢？
为什么跑步项目跑步方向是逆时针的呢？
08-03-06 & 发布
绕逆时针跑,根据 向心力=质量*角速度~2*半径心脏在左边,绕逆时针的话,心脏的半径小,受到的离心力就小.对运动员有保护作用!在田径比赛的竞赛项目中，凡200米以上的项目，运动员都是向左转弯（逆时针方向），这是为什么呢？原因有以下两条：其一，人的心脏位于身体左侧，所以重心容易偏左。其二，人的跳跃等动作的起跳脚多是左脚，因为重心偏向左脚，所以向左转弯较容易。有的外国专家解释：人类的脚，左右各有其作用，左脚起支持作用（支持重心），右脚起运动作用（掌握方向和速度）。因重心偏于左脚，所以用右脚蹬地面来增加速度。
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原因有以下两条： 其一，人的心脏位于身体左侧，所以重心容易偏左。 其二，人的跳跃等动作的起跳脚多是左脚，因为重心偏向左脚，所以向左转弯较容易。 有的外国专家解释：人类的脚，左右各有其作用，左脚起支持作用（支持重心），右脚起运动作用（掌握方向和速度）。因重心偏于左脚，所以用右脚蹬地面来增加速度．
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的外国专家解释：人类的脚，左右各有其作用，左脚起支持作用（支持重心），右脚起运动作用（掌握方向和速度）。因重心偏于左脚，所以用右脚蹬地面来增加速度与 1912年，国际田联成立之际，把赛跑的方向统一定为以左手为内侧，即左转弯，并列入田联规则，沿用至今
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和心脏的关系。同意楼上的楼上。
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以上回答均很专业！！！
请登录后再发表评论!英语翻译在田径比赛的竞赛项目中,凡200米以上的项目,运动员都是向左转弯（逆时针方向）,这是为什么呢?原因有以下两条：其一,人的心脏位于身体左侧,所以重心容易偏左.其二,人的跳跃等_作业帮
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英语翻译在田径比赛的竞赛项目中,凡200米以上的项目,运动员都是向左转弯（逆时针方向）,这是为什么呢?原因有以下两条：其一,人的心脏位于身体左侧,所以重心容易偏左.其二,人的跳跃等
英语翻译在田径比赛的竞赛项目中,凡200米以上的项目,运动员都是向左转弯（逆时针方向）,这是为什么呢?原因有以下两条：其一,人的心脏位于身体左侧,所以重心容易偏左.其二,人的跳跃等动作的起跳脚多是左脚,因为重心偏向左脚,所以向左转弯较容易.有的外国专家解释：人类的脚,左右各有其作用,左脚起支持作用（支持重心）,右脚起运动作用（掌握方向和速度）.因重心偏于左脚,所以用右脚蹬地面来增加速度与 1912年,国际田联成立之际,把赛跑的方向统一定为以左手为内侧,即左转弯,并列入田联规则,沿用至今 还有这个说法的 其实古代奥林匹克运动会的径赛并没有绕圈跑,它是在直线跑道上来回跑的.而近代的田径比赛刚开始出现在英国,与赛马一样是以顺时钟方向来跑,近代奥运（1896）一开始也是以向右的顺时针方向跑,到了1912年国际田径总会成立后突然规定更改为逆时针方向跑,并没有解释啥原因.至於各项比赛目前似乎都以逆时针方向来进行的原因,有一些说法例如保护心脏说、惯用手说、运动脚说等众说纷纭莫衷一是 人的大脑分左右两个半球,左右的功能不一样.人的左脑支配右半身的活动,右脑则支配左半身的活动.在日常生活中,大多数人养成了用右手干活、写字、工作的习惯,而左脑又主要是进行高级思维活动的,因此大大加重了左脑的负担.人体为了维护全身的平衡,必须加强受右脑支配的左腿功能,所以多数人感到左腿比右腿有力.赛跑时,多数运动员都是用左腿作为后蹬腿的.在跑弯道时,由于左腿有力,按逆时针方向跑,左腿就能很好地克服身体的离心力,避免向内侧倾倒.右腿力量比左腿小,如果按顺时针方向跑,就会感到身体不稳,容易摔倒.人在滑冰、骑自行车拐弯和跑步时,也有同样感觉
In the contest item of the track and field events, the item of any more than 200 meter, the athletes all turn left curved(negative the hour hand direction), this is why?The reason has two followings: It one, the person's heart locates the left side of the body, so the center of gravity is partial to easily left. It two, the person jump up etc. action of since jump feet mostly left foot, the center of gravity inclines toward left foot, so turn left curved compare easily. The foreign expert, who have, explain:The mankind's feet, or so and each have it the function, the left foot contain the support function(support center of gravity), the right foot contain the sport function.(control the direction and speed)Because the center of gravity is partial to in the left foot, so gather speed with the right foot 蹬 ground with In 1912, at the moment that international farmland 联 establish unifies the direction for run a race to settle in order to take left hand as seamy side, then turn to the left curved, be juxtaposed into the farmland 联 rule, follow to use up to now Still have this parlance The track events of the in fact ancient Olympic sports games didn't round a turn to run, it was in the straight line runway to come up to return to something to run.And the track and field events of the modern age just started appear in England, similar to horse-racing with agreeable the clock direction to run, modern Olympics(1896) a beginning also with rightward clockwise run, arrive in 1912 international farmland path to rule to change suddenly to run for the negative hour hand direction after always willing establish, explain what reason. Go to 於 , various games seem to be to all carry on with negative hour hand direction currently of reason, have some parlances for example the protection heart say,consistently use say,sport the feet say etc. the profusion of different opinions 莫衷 is on being the person's brain to divide or so two hemispheres, the or so function is different.The person's left brain controls a right and half-length activity, the right brain then controls a left and half-length activity.In the daily life, the most people develops to live,write in the right hand stem,the habit of the work, but the left brain mainly carries on a deluxe thinking activity again, so aggravated the burden of the left brain consumedly.The human body has to strengthen to be subjected to the left leg function that the right brain control for supporting the balance of the whole body, so the majority feel a left leg more emollient than right leg.While run a race, most athletes all use left leg as the empress 蹬 leg.BE emollient because of the left leg while run curved way, press negative hour hand direction to run, the left leg can overcome body nicely of leave mental exertion, avoid toward seamy side dump.The right leg strength is smaller than left leg, if press clockwise run, will feel body unsteady, fall down easily.Person while skate,ride bicycle to turn a corner with running, also have a same felling 回答者：只缘生在此山中 - 童生 一级 4-25 19:39In the contest item of the track and field events, the item of any more than 200 meter, the athletes all turn left curved( negative the hour hand direction), why this is?The reason contain two followings: It a, the person's heart locates the left side of the body, so the center of gravity is partial to easily left. It two, the person jumps up etc. action of since jump the feet mostly left foot, the center of gravity inclines toward the left foot, so turn left curved compare easily. The foreign expert who have explain:The mankind's feet, or so and each have it the function, the left foot rises to support the function( support center of gravity), the right foot rises the sport function.( control the direction and speeds)The center of gravity is be partial to in left foot, so gather speed with the right foot 蹬 ground with In 1912, at the moment that international farmland 联 establish, unified the direction that run a race to settle in order to take left hand as the seamy side, then turn to the left curved, be juxtaposed into the farmland 联 rule, follow to use up to now Still have this parlance of The track events of the in fact ancient and Olympic sports games did not round the turn to run, it come up to return to something to run in the straight line runway.And the track and field events of the modern age just starts appear in England, similar to horse-racing with agreeable the clock direction to run, the modern Olympics(1896) is on start also with rightwards clockwise run, arrive the international farmland path of 1912 total will establish after rule to change suddenly to run for the negative hour hand direction, did not explain what reason. Go to various games of 於 to seem to currently all with negative hour hand direction the reason that carry on, have some parlances for example protection the heart say, consistentlies use to say, sport the feet say etc. the profusion of different opinions 莫衷 is on is the person's brain about cent two hemisphere, the or so function is different.The person's left brain controls the right and half-length activity, the right brain then controls the left and half-length activity.In the daily life, the most people developped to live, write with the right hand stem, the habit of the work, but left brain again mainly is to carry on the deluxe thinking activity of, so aggravated the burden of the left brain consumedly.Human body for the sake of the balance of the maintenance whole body, must strengthen to be left leg function by the right brain domination, so the majority feel the left leg more emollient than right leg.While run a race, the 蹬 leg after most thletes all use the left leg conduct and actions of.While run curved way, is emollient because of the left leg, press negative the hour hand direction run, the left leg can overcome the body nicely of leave the mental exertion, avoid dumping toward seamy side.The right leg power is smaller than left leg, if press clockwise run, will feel the body unsteady, fall down easily.Person while skate, riding the bicycle to turn a corner and run, also have the same felling
In the contest item of the track and field events, the item of any more than 200 meter, the athletes all turn left curved(negative the hour hand direction), this is why?The reason has two followings: ...
In the contest item of the track and field events, the item of any more than 200 meter, the athletes all turn left curved( negative the hour hand direction), why this is?The reason contain two followi...
too hard !
At in the track and field competition competition project, every 200 meter above project, the athletes all are the left face are curved (counter clockwise), why is this? The reason has following two: ...
At in the track and field competition competition project, every 200 meter above project, the athletes all are the left face are curved (counter clockwise), why is this? The reason has following two: ...
In the contest item of the track and field events, the item of any more than 200 meter, the athletes all turn left curved( negative the hour hand direction), why this is?The reason contain two followi...
In track and field competition sports, where more than 200 metres project athletes are left to the (anti), which is why? The following two reasons :
First, the people at the heart of the physical si...
In track and field competition sports, where more than 200 metres project athletes are left to the (anti), which is why? The following two reasons :
First, the people at the heart of the physical si...
At in the track and field competition competition project, every 200 meter above project, the athletes all are the left face are curved (counter clockwise), why is this? The reason has following two: ...下列各运动方向，属于逆时方向的是（　　）A．北半球的反气旋B．南半球中、低纬度海区的大洋环流C．从南极上空看西风漂流的流向D．夏季的北印度洋季风洋流_作业帮
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下列各运动方向，属于逆时方向的是（　　）A．北半球的反气旋B．南半球中、低纬度海区的大洋环流C．从南极上空看西风漂流的流向D．夏季的北印度洋季风洋流
下列各运动方向，属于逆时方向的是（　　）A．北半球的反气旋B．南半球中、低纬度海区的大洋环流C．从南极上空看西风漂流的流向D．夏季的北印度洋季风洋流
A、北半球上反气旋气流运动方向为顺时针，故不符合题意；B、南半球中、低纬度海区上大洋环流为逆时针，故正确；C、从南极上空看西风漂流上流向为顺时针，故不符合题意；D、夏季上北印度洋季风洋流流向为顺时针，故不符合题意．故选：B．
本题考点：
气压系统与天气；世界洋流分布规律．
问题解析：
主要考查了反气旋和洋流，北半球的反气旋气流运动方向为顺时针；南半球中、低纬度海区的大洋环流为逆时针；从南极上空看西风漂流的流向为顺时针；夏季的北印度洋季风洋流流向为顺时针．在平面直角坐标系中，一动点Ｐ（Ｘ，Ｙ）从Ｍ（１，０）出发，沿由Ａ（-１，１），Ｂ（-１，-１），Ｃ（１，-１），Ｄ（１，１）四点组成的正方形边线（如图１）按逆时针方向运动，图２是Ｐ点运动的路程Ｓ（个单位）与运动时间Ｔ（秒）之间的函数图像，图３是Ｐ点纵坐标Ｙ与Ｐ点运动路程ｓ之间的函数图象的一部分。　 （１）ｓ与ｔ之间的函数关系式是： （２）与图３相对应的Ｐ点运动路径是：（写出０≤Ｓ≤４时，Ｐ点从什么点运动到了什么点）；Ｐ点出发几秒首次到达Ｂ点； （３）写出当３≤Ｓ≤５时，Ｙ与Ｓ之间的函数关系式，并在图３中补 - 同桌100学习网
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在平面直角坐标系中，一动点Ｐ（Ｘ，Ｙ）从Ｍ（１，０）出发，沿由Ａ（-１，１），Ｂ（-１，-１），Ｃ（１，-１），Ｄ（１，１）四点组成的正方形边线（如图１）按逆时针方向运动，图２是Ｐ点运动的路程Ｓ（个单位）与运动时间Ｔ（秒）之间的函数图像，图３是Ｐ点纵坐标Ｙ与Ｐ点运动路程ｓ之间的函数图象的一部分。　 （１）ｓ与ｔ之间的函数关系式是： （２）与图３相对应的Ｐ点运动路径是：（写出０≤Ｓ≤４时，Ｐ点从什么点运动到了什么点）；Ｐ点出发几秒首次到达Ｂ点； （３）写出当３≤Ｓ≤５时，Ｙ与Ｓ之间的函数关系式，并在图３中补
在平面直角坐标系中，一动点Ｐ（Ｘ，Ｙ）从Ｍ（１，０）出发，沿由Ａ（-１，１），Ｂ（-１，-１），Ｃ（１，-１），Ｄ（１，１）四点组成的正方形边线（如图１）按逆时针方向运动，图２是Ｐ点运动的路程Ｓ（个单位）与运动时间Ｔ（秒）之间的函数图像，图３是Ｐ点纵坐标Ｙ与Ｐ点运动路程ｓ之间的函数图象的一部分。　
（１）ｓ与ｔ之间的函数关系式是：
（２）与图３相对应的Ｐ点运动路径是：（写出０≤Ｓ≤４时，Ｐ点从什么点运动到了什么点）；Ｐ点出发几秒首次到达Ｂ点；
（３）写出当３≤Ｓ≤５时，Ｙ与Ｓ之间的函数关系式，并在图３中补全４≤Ｓ≤８时的函数图象。
提问者：crmcrm
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解：（1）由图2可设ｓ与ｔ之间的函数关系式：s=kt(k≠0)(t≥0)
(2,1)在函数图象上，所以k=1/2
所以ｓ与ｔ之间的函数关系式：s=1/2t (t≥0)
(2)∵Ｐ点纵坐标是Ｙ，Ｐ点运动路程是ｓ
∴０≤Ｓ≤４时，Ｐ点从M点运动到了N点.
到达B点，S=5，代入s=1/2t得，t=10
∴Ｐ点出发10秒首次到达Ｂ点
(3)∵图像过（3,1），（4,0）。当s=5时，y=-1
∴当３≤Ｓ≤５时,Ｙ与Ｓ之间的函数关系式:y=-s+4
４≤Ｓ≤８时的函数图象和0≤Ｓ≤4时的函数图象关于（4,0）点成中心对称。所以根据对称可轻易做出图像。
回答者：teacher084
解：（1）由图2可设ｓ与ｔ之间的函数关系式：s=kt(k≠0)(t≥0)
(2,1)在函数图象上，所以k=1/2
所以ｓ与ｔ之间的函数关系式：s=1/2t (t≥0)
(2)∵Ｐ点纵坐标是Ｙ，Ｐ点运动路程是ｓ
∴０≤Ｓ≤４时，Ｐ点从M点运动到了N点.
到达B点，S=5，代入s=1/2t得，t=10
∴Ｐ点出发10秒首次到达Ｂ点
(3)∵图像过（3,1），（4,0）。当s=5时，y=-1
∴当３≤Ｓ≤５时,Ｙ与Ｓ之间的函数关系式:y=-s+4
４≤Ｓ≤８时的函数图象和0≤Ｓ≤4时的函数图象关于（4,0）点成中心对称。所以根据对称可轻易做出图像。
回答者：teacher051为什么在显微镜里,物体从上往下运动方向是相反的,而逆时针或顺时针方向运动则方向_作业帮
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为什么在显微镜里,物体从上往下运动方向是相反的,而逆时针或顺时针方向运动则方向
为什么在显微镜里,物体从上往下运动方向是相反的,而逆时针或顺时针方向运动则方向
象是关于中心对称的.你看钟,当你看到12点的时候,它实际在6点的地方当你看到11点的时候,它实际在5点的地方此为上下颠倒但当物体由12点到11点的时候,它实际是由6点到了5点,可见逆时针或顺时针方向运动是不变的.
就是光学一倍焦聚成倒像的原理。