Of the gravitational potential energy...
重力势能的关系。
This is the gravitational potential energy.
这是重力势能。
Mhy You see? Mgy is gravitational potential energy.
你们看，是重力势能。
Notice the gravitational potential energy goes down.
注意，重力势能，是减小的。
Notice that the gravitational potential energy increases.
注意，这里，重力势能是增加的。
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
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。
So you're using, then, the conversion of gravitational potential energy to kinetic energy.
所以你在利用，重力势能，转换成，动能。
So if I make a plot of the gravitational potential energy as a function of y, then I would get a straight line.
因此如果我画一张,重力势能,受y变化的图，那么会得到一条直线。
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。
Hence, the loss of gravitational potential energy of the block equals the gain of elastic potential energy of the spring.
因此，该物块的重力势能的减少，等于该弹簧的弹性势能的增加。
You can install a disk in your car, which I would call, then, a flywheel, And you can convert the gravitational potential energy.
可以在车内装个圆盘，可以称之为飞轮，可以转化，重力势能。
Then this will have a positive gravitational potential energy, and this will have one that is higher than this one by this amount.
那么它将是,正的重力势能，这样的话这点,就比另一点高。
Now, what we would like to do is we would like to convert all this gravitational potential energy into kinetic energy of that disk.
现在要做的，就是要转化，所有这些重力势能，变成圆盘的动能。
There is a conversion from gravitational potential energy to kinetic energy back to gravitational potential energy, and it will come to a stop here.
这就是重力势能，转换到，动能，再回到，重力势能，最终停在这里。
Okay, my goal was to evaluate for you the gravitational potential energy the way that it is defined in general, not in a special case when we are near the Earth.
好了，我的目标是，用通常的方式，为你们评价重力势能，不是用一个特殊的，接近地球的案例。
Rain energy and gravitational potential energy were original energies of rocky desertification form in nature ecosystem, and were direct or primary motivity.
石漠化形成的主要原动力是自然生态系统的雨水动能和重力势能，亦是其形成的直接动力或第一性动力。
So the slowdown, the "braking" is now done because of a conversion from your linear speed which comes from gravitational potential energy to the rotation of the disk.
所以减速，刹车通过，能量的转换达到了，从，重力势能，转化到旋转圆盘上。
The formal definition is that the gravitational potential energy at a point P is the work that I, Walter Lewin, have to do to bring that mass from infinity to that point P.
形式定义就是,它在点P的重力势能,等于我，将物体从无穷远处,移动至点P所做的功。
Working principles Airflow screen machine abandon gravitational potential energy principle of operation, using air as the carrier, kinetic energy of the operation principle of work.
气流筛分机摈弃重力势能作业原理，采用空气作载体，动能作功的作业原理。
What is important, of course, if we get the right answer for the gravitational potential energy, that when we move away from this object that the gravitational potential energy increases.
重要的是，如果我们得到了重力，势能的正确值，当我们远离这个物体，重力势能就会，增加。
If the compressibility of seawater is considered, the APE should be divided into two parts: The Available Gravitational Potential Energy (AGPE) and The Available Internal Energy (AIE).
考虑海水的可压缩性时，有效位能包括有效重力位能与有效内能两部分。
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。
You know, if you want to measure the potential energy of something in a gravitational field, you have to define the zero somewhere, right, because it's arbitrary.
你知道，如果你想测量重力场，中某种东西的势能，你需要，在某处定义一个零点，对吧？
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。
In physics, you call potential, electrical potential or gravitational potential, the potential energy.
在物理学里面，把势，称为势能。
The water tunnel of gravitational type is driven by the water's potential energy.
水洞种类之一的重力式水洞依靠水的势能来提供动力。
The water tunnel of gravitational type is driven by the water's potential energy.
水洞种类之一的重力式水洞依靠水的势能来提供动力。
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