Mhy You see? Mgy is gravitational potential energy.
你们看，是重力势能。
Notice that the gravitational potential energy increases.
注意，这里，重力势能是增加的。
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。
Notice the gravitational potential energy goes down.
注意，重力势能，是减小的。
This is the gravitational potential energy.
这是重力势能。
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。
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
Of the gravitational potential energy...
重力势能的关系。
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。
This problem demonstrates why the energy density of gravitational field is negative.
本题演示为何重力场的能量密度是负的。
This problem demonstrates why the energy density of gravitational field is negative.
本题演示为何重力场的能量密度是负的。
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