如果我站在赤道和旋转方向扔了块石头,石头会走多远比我扔另一个方向吗?- 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 - 10 - t03:13:35z //www.hoelymoley.com/feeds/question/24277 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/24277 0 如果我站在赤道和旋转方向扔了块石头,石头会走多远比我扔另一个方向吗? 究竟为什么 //www.hoelymoley.com/users/27567 2022 - 09 - 03 - t08:35:04z 2022 - 09 - 03 - t13:21:14z < p >假设6378.1公里(3963英里)的一个旋转的地球半径,多远会附加动量携带一块石头如果我扔在地球自转的方向(即向东)当站在赤道在海平面上,比如果我扔的强迫另一个方向?多少百分比的差异还是permille ? < / p > //www.hoelymoley.com/questions/24277/-/24279 # 24279 3 答案由JeopardyTempest如果我站在赤道和旋转方向扔了块石头,石头会走多远比我扔另一个方向吗? JeopardyTempest //www.hoelymoley.com/users/6298 2022 - 09 - 03 - t11:40:25z 2022 - 09 - 03 - t13:21:14z < p >你,石头,赤道上的所有位置,气氛略高于赤道基本上都以相同的最初动力。当你扔,在大局,收益总动量(如果把东)或输总动量(如果扔向西)。But because its course and momentum do not shift it from being along the equator, its altered momentum will not have any "carryon" momentum difference horizontally that imparts apparent motion. In other words, for the east/west aspect DIRECTLY, the Earth's rotation will have no impact, it will continue doing what it was doing. You can consider its initial momentum from the Earth and its added momentum from the throw entirely separately... it will hit where you expect it to hit from this factor. The eastward or westward component have no bearing at all because it remains at the Equator.

It's like being on a moving train, and tossing a rock to your friend within the train car. Everything is moving the same rate, there is no difference.
So directly (from the eastward or westward direct of the throw), there is no difference at all along the equator.

However, there is still one difference in rotation rates for paths at the Equator. As the rock goes UP, it will have less velocity than required at that height (because the horizontal velocity needed to maintain the same rotation rate is more), and so it will lag behind. It will wind up west of where it should have... regardless of whether you threw it east or west. This difference is only a factor of the vertical component of the throw.

That said, if you're throwing it, it's going to be a pretty quick trajectory. Short distances and times have very little Coriolis deflection.

The amount of deflection becomes a nonlinear PDE (as early Coriolis alteration in the path changes both its subsequent landing time and its upcoming Coriolis deflection), so I don't believe you can derive a simple formula for the true percentage change.

But for a typical throw attempting an east or west motion, you won't have much vertical velocity, and gravity is very good at removing that component quickly. The deflection for a typical strong human's throw will be on the order of millimeters or less (this is true wherever you throw it on Earth).

The percentage of horizontal deflection would actually be infinite if thrown straight up (since a millimeter divided by 0 is still a "giant" change), and will quickly become a minuscule percentage if any horizontal component is given to the throw; a footballer's pass will not be noticeably altered by Coriolis anywhere on Earth. Air resistance/wind will be much much more significant factors. Even for missiles, which have much more velocity and so can fly for much longer times and thereby reach areas with significantly different rotational momentum, Coriolis deflection will only be on the order of a small percent. But a few percent can mean a few km/miles for intercontinental trajectories... kind of important for a targeted missile!

Only things that can stay "aloft" "permanently"... i.e. fluids (gases, and also liquids)... does Coriolis have a relatively giant impact (causing air that should otherwise flow directly from high to low pressure into air that rotates along isobars)
Baidu
map