科里奥利效应差异。如何演绎效果的方向?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 08 - t07:53:28z //www.hoelymoley.com/feeds/question/13347 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/13347 3 科里奥利效应差异。如何演绎效果的方向? user12202 //www.hoelymoley.com/users/12202 2018 - 02 - 12 - t13:40:33z 2018 - 02年- 15 - t14:30:52z < p >据我所知(如果我错了请纠正我),地球旋转逆时针从北极。这意味着从赤道到北极的角度来看,它是顺时针旋转。因此,如果我拍摄一个弹丸从赤道向北极,它应该向左边移动同样如果我扔一个球向人在我面前clockwise-rotating转盘。但是,在我的教科书和维基百科说,它会向右。我把它错了哪里? < / p > //www.hoelymoley.com/questions/13347/-/13351 # 13351 8 答案由Camilo Rada科里奥利效应差异。如何演绎效果的方向? 卡米洛·Rada //www.hoelymoley.com/users/11908 2018 - 02 - 12 - t17:03:56z 2018 - 02年- 15 - t14:30:52z < blockquote > < p >这意味着从赤道到北极的角度来看,它是旋转顺时针< / p > < /引用> < p >你有错误的一部分。从赤道(地球上的任何其他的点),北极不旋转。旋转只出现在一个外部的参照系。,实际上是使用一个内部的参照系(像一个观察者在赤道)产生科里奥利力,并不是一个真正的力量,但只是从一个旋转的惯性参照系。< / p > < p >从赤道,北极是定位,以及天球北极,这是解决由于北赤道地平线。但开始,太阳绕它从东到西,是<强>逆时针< /强>。这是因为观察者向东移动。< / p > < p >科里奥利更容易理解如果你想象地球表面上的任何点(或大气中)赤道以北的,必须完成一个环绕地球的小圆轴每24小时。因此,这些点正在向东以较慢的速度比在赤道。因此,如果你射弹,将超额向东速度相对于地面下它,所以它会向东去。会像天际将向右<强> < /强>。 If the projectile is flying south from the Equator, Eastwards will mean leftwards.

This schematics from Facts About All will help in an example: enter image description here

Let's imagine you are at at the monument "La Mitad del Mundo" right on the Equatorial line on Ecuador. And you shoot a projectile straight North to Raleigh, North Carolina, 3,960 km North of "La Mitad del Mundo".

Let's say your canon shoots a frictionless projectile at speed of 1,000 km/h. Then the projectile had a Northwards speed of 1,000 km/h, and an Eastward speed of 1,666 km/h which is the speed the canon at Ecuador have in order to go around the earth center every 24 hours.

Now, in 3.96 hours, the projectile would have reached the latitude of Raleigh, but in the same amount of time the eastward component of its speed took it 6,600 km to the East. However, the eastward velocity of Raleigh is only 1356 km/h

That is because at latitude 35.7° the distance to the Earth rotation axis is only 5,179 km (in contrast with 6,378 km at the equator), therefore, the distance it have to travel around it every 24 hours is only 32,540 km (in contrast to 40,000) requiring a speed of just 1356 km/h.

That means that, while the projectile wast traveling, Raleigh only moved 5,369 km eastwards, 1,231 km less than the projectile, with the consequence that the projectile ended up, 1,231 km to the East of Raleigh (The right as seen from "La Mitad del Mundo"), catastrophically missing the target, and falling in the Atlantic ocean somewhere north of Bermuda.

This excess eastward velocity visualization of Coriolis, seemingly falls apart when considering a projectile shoot due East or West. But it would still be deflected to the right (in the northern hemisphere). An explanation in such case can be found in this answer, however that answer is not as clear as I would like, as it just ignores the vertical effect, also known as Eötvös effect, which is important to make sense of the deflection of a projectile traveling East/West. In short, the increased/decreased velocity of a projectile moving East/West, increase/decrease the centrifugal force, so it moves away/towards from Earth's axis of rotation. This means "moves up" at the equator, and move south/north and up (in different proportions) north of the equator. The rightwards deflection is considered part of the Coriolis effect, while the upwards deflection is the Eötvös effect.

//www.hoelymoley.com/questions/13347/-/13353 # 13353 2 答案由JeopardyTempest科里奥利效应差异。如何演绎效果的方向? JeopardyTempest //www.hoelymoley.com/users/6298 2018 - 02 - 12 - t21:19:32z 2018 - 02年- 13 - t10:34:40z < p >这是一段时间以来我想到这个…每次它仍然需要仔细思考。但希望这能帮助你把它放在一起!< / p > < p >第一:是的地球绕杆逆时针转动……< / p > < p > < a href = " https://i.stack.imgur.com/N9Kxsm.jpg " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/N9Kxsm.jpg " alt = " NH旋转" > < / > < / p > < p >问题是,当你拍摄一个物体对北极“由于北”……<强>你真的不拍摄,由于北方速度< / >强壮!< / p > < p >为什么?< / p > < p >火箭的初始运动不仅仅是它的发射轨迹…但也包括运动位置发射。这是你的车就像如果你是推动州际公路,和选择扔窗外“直接侧向”……你会发现可以继续前进,因为它沿着路反弹。

And the thing is, the further poleward a place is, the less eastward velocity those places are rotating with. Yet your projectile has brought its higher eastward velocity it started with. So it winds up ahead of where you think it should if going true north, because it rotates eastward faster than that location. [For the car-can analogy, if someone was driving slower in the lane beside you... the thrown can would actually seem to travel forward away from him, until air resistance worked enough to slow it down......]

(Likewise, hopefully you can also see that "eastward" itself is actually changing the direction it points on the overhead view [originally east of Algeria is straight to the right, but by the time it has moved to the end of the green arrow, it becomes up and right]. However the projectile keeps its exact same direction arrow. If you follow along the path of that arrow, in terms of cardinal directions... its "northward" progression slows, and it actually eventually starts moving what is then south . So the rotation of the Earth not only alters what we perceive to be east-west movement [turning it to the right in the NH], but also likewise alters the north-south movement [the same turning to the right in the NH occurs, regardless of whether]. We see the rocket as behaving oddly, but the issue isn't with the rocket, but due to the fact that we're actually continually moving AND changing direction to rotate around the Earth.)

True motion and path (Note the Earth rotates too of course, so Algeria will truly have moved around near the area where the yellow arrow ends by the time it gets up there.)

And it may well help a lot to note: it actually does the exact same (turn right) when operating from a counter-clockwise rotating turntable too!

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