Under the control of the Sun's gravitational force, each planet maintains an elliptical orbit and all of them travel in the same direction.
在太阳引力的控制下，每个行星都维持在一条椭圆形的轨道上，并按照相同的方向移动。
Try and work out the gravitational force between two objects in terms of a quantum graviton, however, and you quickly run into trouble-the answer to every calculation is infinity.
但是尝试用量子引力子解决两个物体之间的万有引力，你很快会遇到困难——每种计算的答案都是无穷大量。
Those forces affecting the wine were the centrifugal force pushing the liquid to the outside of the glass and the gravitational force shoving the liquid back down.
这些影响着葡萄酒的力是将葡萄酒推出葡萄酒杯的离心力和将液体拉回来的重力。
When you are trying to get an idea to survive the gravitational force of operations, you need to preserve those windows of non-stimulation.
“当你试着想出一个想法来摆脱万有引力的印象时，你需要保持一个无外界影响的平台”。
We may take it for granted now, but more than 300 years ago Sir Isaac Newton proposed a revolutionary idea: that any two objects, no matter their mass, exert gravitational force toward one another.
或许如今我们对此已习以为常，然而艾萨克·牛顿先生300多年前提出的观点在当时颇具颠覆意义：任意两物体，无论质量如何，彼此之间具有引力。
If they are three units apart the gravitational force between is one ninth.
如果有三个单位的距离，那么引力就是九分之一。
There is a gravitational force.
有一个重力作用。
So if we apply that concept, then we first have to know what is the gravitational force.
如果我们运用这概念，我们必须先知道，引力是什么。
When I'm here, gravitational potential energy ; increases in this way; the gravitational force is in this direction.
重力势能，这样增长,重力;,是在这个方向,当我在这里。
So let's now turn to Newton's universal law of gravity, and believe it or not, I think I even give you on the exam the gravitational force of Newton's universal law of gravity.
下面是牛顿的万有，引力定律，不管你信，或不信，在考试中，我出了关于万有引力，定律的题目。
And now we're going to multiply that by the gravitational force constant.
我们现在把这个结果，和重力常量相乘。
And so you see that the gravitational force due to the earth on a particular mass is linearly proportional with the mass.
你知道重力由地球产生，它与物体质量，成正比。
mg There's a gravitational force, which is mg, but there is also tension.
存在重力也就是，但是还存在张力。
And there has to be here a force on the system, the gravitational force, which is the same as the centripetal force.
这个系统中，存在重力，和向心力相等。
If I look at this result — the sum of gravitational potential energy and kinetic energy is conserved - for gravitational force — then it is immediately obvious where we put the zero of kinetic energy.
如果看这个结果-，重力势能与动能之和，在重力作用下，是守恒的-，马上，很明显的发现，动能为0的地方。
According to Mr Hiller, his shunter has to withstand decelerations of 5g (ie, five times the force of the Earth’s gravitational field).
根据Hiller的说法，他的新调列车头要能承受得起5g的反向加速度（也就是5倍于地球重力）。
According to Mr Hiller, his shunter has to withstand decelerations of 5g (ie, five times the force of the Earth's gravitational field).
根据Hiller的说法，他的新调列车头要能承受得起5g的反向加速度（也就是5倍于地球重力）。
Thanks to Newton's universal law, we can figure out the gravitational force between any two objects.
正是有了牛顿的万有引力定律，我们才能计算出任意两物体间的引力。
And it's important conceptually because a lot of the forces are gradients of potentials, namely, gravitational force, electric force.
这在概念上很重要，因为很多力都是势场的梯度，比如重力场，电场。
For those of us on Earth (basically all of us, ISS-crew excepted), the moon's gravitational force is most evident in the way it influences the tides.
对于生活在地球上的人而言(所有的人，除了国际太空站的工作人员以外)月球引力最显著的表现就是对潮汐变化的影响。
If we know the force — in this case, the spring force or in those cases, - the gravitational force — we were able to calculate the potential energy.
在这个例子里-，弹力，或这些例子里，重力，我们能够-，计算出势能，现在问题是。
slide-"Example: Newton's famous approximate formula for the gravitational force between two bodies.
幻灯片出现：牛顿著名的万有引力公式。
the force, gravitational force, falls off as one over r squared.
,力，重力，随着r的平方而减少。
The force of gravitational attraction between two bodies decreASe AS the distance between them increASes.
两物体之间的引力随着两物体之间的距离增大而减小。
For deviated wellbores, where gravitational force pulls casing to the low side of the hole, more robust solid-bladed centralizers are better if hole conditions allow their use.
对于斜井，由于重力迫使套管平躺于井壁的下侧，如果井眼条件允许，更为结实的固体刀翼式扶正器更为合适。
A Normally I write an "a" for it, but I make an exception now because gravity, I call it "gravitational force."
一般加速度写作，但这儿是个例外，因为涉及到重力。
"Cook Aims to Provide Jobs's 'Gravitational Force' at Apple," by Adam Satariano and Peter Burrows, Bloomberg Businessweek, Aug. 25, 2011.
Cook志在在苹果为Jobs提供“万有引力”，AdmSatarian和PeterBurrows说，《商业周刊》，2011.8.25。
This strong connection is like a gravitational force on a higher dimension.
这种强烈的关系，就好像更高维次里的万有引力。
Compared with the other three forces in the universe (electromagnetism, the weak nuclear force and the strong nuclear force), gravity is relatively feeble, making gravitational waves hard to detect.
和宇宙中的其他三种力(电磁力、弱核力、强核力)相比，重力就微弱得多了，所以引力波很难被观测。
In an analysis of the process in which Einstein established general relativity it is found that gravitational force is a fundamental problem in nature and even the whole universe.
对爱因斯坦建立广义相对论的过程进行了分析，引力问题是自然界乃至整个宇宙世界的一个基本问题。
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