The limitations are that you just can’t charge the batteries fast enough to take all the potential energy that’s available in a braking event.
那些限制就是，在一次刹车期间，你只是无法给蓄电池充电充的足够快而取走所有潜在的可以利用的能量。
Calories can be defined as potential energy for the body.
卡路里对于身体来说是一种潜在的能量。
The limitations are that you just can't charge the batteries fast enough to take all the potential energy that's available in a braking event.
那些限制就是，在一次刹车期间，你只是无法给蓄电池充电充的足够快而取走所有潜在的可以利用的能量。
In fact, anything we eat is considered to be potential energy for our body.
事实上我们吃的任何东西都是身体的潜在能量。
Why collect all this information if most of this potential energy will never be tapped?
如果这些潜在能源永远不能被利用那么收集这些信息还有什么意义？
And that's potential energy that goes into the spring.
这是存进弹簧的能量。
Notice that the gravitational potential energy increases.
注意，这里，重力势能是增加的。
And how about potential energy? It is not bound.
那么什么是势能，答案不是一定的。
The force will drive it to lower potential energy.
势能减小的方向，如果我们知道这个力。
That is, you minimize potential energy and you see things falling under the force of gravity and so forthgoing to potential energy minima in conformance with this result.
换句话说，你使得势能最小化,然后发现我们关注的东西,在重力或者其他力的作用下下落,直到势能最小的地方,这和我们刚才的结果是一致的。
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。
The spontaneous change lowers the potential energy in that case.
在这个例子中,自发变化减小了势能。
That means the sum of potential energy and kinetic energy.
总功指的是势能,和动能的总和。
Notice the gravitational potential energy goes down.
注意，重力势能，是减小的。
You see, that is the term of the potential energy that you have there.
你们看，这是，我们已经得到的，势能的等式。
That's the potential energy from the spring.
那是弹簧储存的能量。
At infinity, there's no stored potential energy, and it drops off more and more negative as one over r.
在无限远处，没有储存的势能，并且它向负方向减少，当距离超过R时。
And so I put potential energy in the spring by pushing them together, and they are lined up now here.
弹簧中储存了能量，把它们挤在一起，它们排列在这里。
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。
There is potential energy in that spring.
弹簧中储存了能量。
That is the potential energy at c, which reaches a maximum.
这是点c的势能，在此达到最大值。
This is the kinetic energy for something in orbit at this radius, and this is the potential energy.
这是在轨道内这个，半径的物体的动能，这是势能。
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。
现在是势能。
那么势能呢？
Then we have the conservation - of mechanical energy — the sum of kinetic energy and potential energy.
我们知道，机械能守恒定律-，动能和，势能的总和。
The attractive energy is just the potential energy, Coulombic potential.
引力能就是电势能，库伦电势。
If you are here, the force is always in the direction opposing increasing potential energy.
力就一直朝着，势能增长的反方向，势能增加。
This is the gravitational potential energy.
这是重力势能。
This is the gravitational potential energy.
这是重力势能。
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