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。
There is a gravitational force.
有一个重力作用。
the force, gravitational force, falls off as one over r squared.
,力，重力，随着r的平方而减少。
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。
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。
A heavenly body kept in orbit around a planet by gravitational force.
一种因引力而沿轨道绕行星旋转的天体。
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。
Newton's law of gravity; Gravitational force from a shell; Hooke's 'law'.
克普勒圆周轨道第三定律；利用积分推导球壳的引力；弹簧。
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。
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。
We are reluctantly accepted the gravitational force between matter and matter, even a look.
我们都在无奈中接受物与物之间的万有引力，甚至是一个目光。
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。
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。
Newton's problem was to express in mathematical terms the gravitational force between different bodies.
牛顿的目标是要用数学形式来表示不同物体之间的引力。
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。
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。
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。
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。
In one direction there is a constant gravitational force, in the other very many irregular blows from the molecules.
在一个方向上有不变的重力在作用，在另一个方向上则是分子的大量不规则的碰撞。
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。
Gravitational field is a kind of vector field, and the description of gravitational force by general relativity is very effective.
引力场是一种矢量场，广义相对论对引力问题的描述是非常有效的。
"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。
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”。
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。
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。
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