This is the gravitational potential energy.

这是重力势能。

youdao

Notice the gravitational potential energy goes down.

注意，重力势能，是减小的。

youdao

Notice that the gravitational potential energy increases.

注意，这里，重力势能是增加的。

youdao

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. You can set it anywhere you want. It's the same with enthalpy.

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？,因为势能的值是任意的,你可以把它设定在。

麻省理工公开课 - 热力学与动力学课程节选

In this case you store electricity as the potential gravitational energy in the weight of water.

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