Now we can calculate what the difference is between the potential energy... the kinetic energy after the collision and the kinetic energy before the collision.
我们可以计算出差别，在储存能量。，与碰撞后动能的差别，还有碰撞前动能。
For us right now, the challenge is figuring out how to transform the technology's potential energy into kinetic energy that can fuel successful projects in both the public and commercial sectors.
对于我们来说，现在的难题是解决如何将技术的潜在能量转化成促使公共和商业部门的项目取得成功的动能的问题。
It means that we better get away from these deterministic models where we have a little electron here with its potential energy and its kinetic energy.
它的意思是我们最好远离，这些确定性模型，那里有一个小电子，它具有势能和动能。
That means the sum of potential energy and kinetic energy.
总功指的是势能,和动能的总和。
Kinetic energy can be converted back to potential energy, can be converted back, - but the sum of them — which we call "mechanical energy" — is conserved.
动能可以转化，成为势能，也可以转化为动能，但是总和-，我们叫做的，机械能，是恒定的。
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。
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。
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。
So what, now, is then the total -- energy of the system-- that is, the sum of the kinetic energy plus the potential energy?
所以现在系统内,总能量是多少-,是动能和,势能之和吗？
That was the potential energy of the spring that was converted into kinetic energy.
这是弹簧储存的能量，它转化为动能。
C at this point c, this has reached a maximum velocity that it can ever have because all the potential energy has been converted to kinetic energy.
在这个点，达到它能达到的，最大动能，因为所有的势能，都转化成了动能。
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。
He has just demonstrated how potential energy turns into kinetic energy by sending the ball flying across the stage, shattering a pane of glass he had bolted to the wall.
他刚刚演示完势能如何转换成动能，球飞越讲台，将他焊在墙上的镜子击破。
The sum of kinetic energy and potential energy doesn't change.
动能和势能，总和没有改变。
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。
So the kinetic energy has increased; the potential energy is the same, so the total energy is up.
所以动能增加，势能不变，所以总能量增加。
So this is the kinetic energy and this is the potential energy.
因此这是动能，这是势能。
You see there first the component of the kinetic energy, which is the and then you see the term which is the potential energy.
你在这里看到的是,动能的公式,这一项,是势能。
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。
The change in potential energy is going to be the change in kinetic energy You have conservation of energy principles.
势能的改变量，将会转化成动能的改变量，这就是能量守恒定律。
When a torque is applied to a body, potential energy is imparted to the body, which accepts it in the form of kinetic energy.
当物体上作用一力矩时，把位能给予了这个物体，物体以动能的形式接受这位能。
Swings work by converting potential energy into kinetic energy, then kinetic energy back into potential energy, over and over again.
秋千的晃动是通过势能与动能的不停转换实现的。势能转换成动能，动能再转换成势能，如此循环。
The piston converts the potential energy of the fuel into the kinetic energy that turns the crankshaft.
活塞把燃料的潜在能量转化成为动能，其将会转动曲轴。
A chart shows the kinetic, potential, and thermal energy for each spring.
图表显示每条弹簧的动力、势和热能。
This paper analyzes energy dissipation and potential utilization of human body. Power harvest ways are surveyed including kinetic energy, heat and chemical energy.
本文分析了人体的能量分布和利用潜力，并对目前能量收集方法进行了总结，包括人体的运动能量、热能和化学能等。
There exist many sources of energy both potential and kinetic.
存在着许多势能和动能的能源。
The basic principles of the structural equivalent modeling process are discussed by using the concept of structural model potential energy and model kinetic energy.
利用结构模态势能和模态动能的概念探讨复合结构等效替代模型的建模原则。
In many example of mechanical motion, there is an interchange between kinetic and potential energies.
在很多机械运动的实例中，有一种是动能和势能之间的相互转化。
In many example of mechanical motion, there is an interchange between kinetic and potential energies.
在很多机械运动的实例中，有一种是动能和势能之间的相互转化。
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