离心力对重力矢量的影响?- 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 - 07 - t06:36:11z //www.hoelymoley.com/feeds/question/18103 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/18103 1 离心力对重力矢量的影响? 拉斯•沃克 //www.hoelymoley.com/users/17963 2019 - 09 - 30 - t08:05:56z 2019 - 10 - 01 - t11:24:15z < p >我现在问这个问题两次从我们最喜欢科学否认社区,我不知道如何解析它。我可以做离心力和重力给定质量,但从来没有试图甚至是否应该有重力的挠度由于离心力在给定的纬度。< / p > < p >我猜我正在出售一座桥与他的数字,但不能肯定。< / p > < p >这是他给我的号码:< / p > < ul > <李>引力(m / s ^ 2) = 9.80576 < /李> <李> 45纬度(度)= < /李> <李>速度(英里/小时)= 735.64 < /李> <李>离心力(m / s ^ 2) = 0.0239809 < /李> <李>重力矢量方向=(0.707107,0.707107)< /李> <李>离心力方向向量=(1,0)< /李> <李>合力=(-6.90974,-6.93372)< /李> <李>合力(相对于地面)=(0.016957,-9.7888)< /李> <李>减肥比北极(%)= 0.172929 < /李> <李>弹下降(时间= 4.51秒)< /李> <李>偏转南(cm) = 17.2454 < /李> <李> < p >落差100米。< / p > < p >怎么我反复检查他告诉我什么呢?我将试图在欧美分享答案作为参考来处理这个所谓的“问题!”< / p > < p >从他提供的CF,我估计物体的表面会有质量(从CalcTools) 712克、漂移和17厘米的100下降的质量似乎是他的10倍(从实例在不同的背阔肌)。< / p > < /李> < / ul > < p > < a href = " https://www.youtube.com/channel/UCHZ2fjTguMMT0EDGSCcPoEw " rel = " nofollow noreferrer " > https://www.youtube.com/channel/UCHZ2fjTguMMT0EDGSCcPoEw < / > < / p > //www.hoelymoley.com/questions/18103/-/18112 # 18112 0 答案由大卫Hammen离心力对重力矢量的影响? 大卫Hammen //www.hoelymoley.com/users/239 2019 - 10 - 01 - t10:49:32z 2019 - 10 - 01 - t11:24:15z < blockquote > < p >我猜我正在出售一座桥与他的数字,但不能肯定。< / p > < /引用> < p >你出售一座桥和他的号码。如果他做了正确的数学,他将获得33.58厘米的偏转45°地心纬度而不是17.245厘米。youtube的评论显示的错误数量。两个关键错误的评论者认为< / p > < ul > <李>本地垂直点直接向地球的中心。李李< / > < >重力加速度,由于地球的质量点在同一方向。< /李> < / ul > < p >那些youtube评论所显示的是,地球是不一个球体。近距离逼近是一个扁球。也就是说,他的言论时间差落入错误的类别。引用艾萨克·阿西莫夫,< / p > < blockquote > < p >当人们以为地球是平的,他们错了。当人们认为地球是球形的,他们错了。但如果你认为认为地球是球形一样错误的认为地球是平的,那么你的观点是时间差比他们两人放在一起。< / p > < /引用> < p >注意,我合格地心纬度在上面。 Geodesists have multiple concepts of latitude. Geocentric latitude is the angle between a line to the center of the Earth and the Earth's equatorial plane. Geodetic latitude is the angle between the normal to the reference ellipsoid and the Earth's equatorial plane. Yet another concept is astronomical latitude, which is the angle between true vertical and the Earth's equatorial plane.

The difference between geocentric and geodetic latitude is at its greatest at 45°. A geocentric latitude of 45° is equivalent to a geodetic latitude of 45° 11' 32.7". Converting that 11' 32.7" difference to radians and multiplying by 100 meters results in 33.58 cm. The difference between geodetic and astronomical latitude is called the deflection of the vertical (or vertical deflection). The deflection of the vertical is rather small, less than 2' (two minutes of arc) even in extremely mountainous terrain. Typical values are a few tens of arc seconds.

What this means is that an oblate spheroid is a better model of the Earth's shape than a sphere. That does not mean a flat Earth model is correct. The Earth's flattening (how squished the Earth is at the poles versus the at the equator) is rather small. The poles are 22 km closer to the center of the Earth than is the equator. Percentage-wise, that's a 0.345% difference.

The reason an oblate spheroid is a better model of the Earth's shape than a sphere is because the Earth is spinning. That spin does two things: It results in a centrifugal acceleration from the perspective of an observer fixed with respect to the rotating Earth, and it results in an equatorial bulge. If the Earth was a uniform density liquid, the spin would make the Earth naturally relax into an oblate spheroidal shape. "Straight down", the combined effects of gravitational and centrifugal acceleration (geodesists call this "gravity" to distinguish it from gravitation) would be exactly normal to the surface.

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