There is a gravitational force.
有一个重力作用。
We shift the gravitational center of it.
我们转移他的重力中心。
This is the gravitational potential energy.
这是重力势能。
Of the gravitational potential energy...
重力势能的关系。
Mhy You see? Mgy is gravitational potential energy.
你们看，是重力势能。
A black hole exerts a strong gravitational pull.
黑洞产生了很强的引力。
Notice the gravitational potential energy goes down.
注意，重力势能，是减小的。
There seems to be a kind of gravitational pull toward God.
似乎有一种引力把我拉向了上帝。
A gravitational field or an electric field, you can't.
在重力场或者电场里面，就做不到了。
Notice that the gravitational potential energy increases.
注意，这里，重力势能是增加的。
In art I want to be free from the earth's gravitational pull.
在摄影作品中，我想脱离地心引力。
Their gravitational pull is so strong, they absorb light.
黑洞的万有引力很强，能把光线吸进去。
Which of them show the effect of gravitational attraction?
以下哪项显示地心引力的效应？
That's the gravitational acceleration if we drop an object here.
这是重力加速度，如果在这掉一个物体。
Design tension born of the gravitational pull between page elements.
在页面元素间紧密设计重力作用的拖拽效果。
We call mgy... we give that a name, "gravitational potential energy."
我们把mgy叫做。,给它一个名字，重力势能
A gravitational lens is formed when light is bent by a massive object.
引力透镜现象就是光被巨大质量物体弯曲的现象。
That was well known, and is caused by the gravitational pull of Venus.
那个发现曾引起巨大轰动，并且被普遍认为是由金星的引力引起的。
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。
A black hole exerts a strong gravitational pull and yet it has no matter.
黑洞产生很强的引力，而它却没有物质。
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。
Such as that the gravitational pull of the earth, "gravity" is wrong.
说那个地球的吸引力问题，“万有引力”也是错误的。
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。
Elevator "Thought Experiments"; Gravitational Red Shift, Light Bending.
电梯思想实验，重力红移，光弯曲。
And we write, often for that gravitational acceleration, the letter "g".
我们通常，用字母g表示，重力加速度。
The motions are directly related to the gravitational pull of the black hole.
这个速度理论上与黑洞的引力作用直接相关。
Let me first give you the formal definition of gravitational potential energy.
我先给你一个对于，重力势能的形式定义。
Let me first give you the formal definition of gravitational potential energy.
我先给你一个对于，重力势能的形式定义。
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