I would say, "Hey, why not apply the work-energy theorem?"
我会说，为什么不用，功能定理？
It turns kinetic energy into heat, and that is perfectly fine in the work-energy theorem.
可以把动能转为热量，这点在功能定理，中是非常好的。
You get exactly the same result, and I find this somehow more pleasing to use the work-energy theorem.
会得到完全相同的答案，我觉得用功能定理，会更加的简洁。
And so you could have used the work-energy theorem or you can use the conservation of mechanical energy.
所以你也可以用，功能定理，或者是机械能，守恒定律。
I used first the conservation - of mechanical energy — there was no friction — and then I showed you that it's completely consistent with the work-energy theorem, so what would you do now?
首先，我用了机械能，守恒定律-，这里没有摩擦力-，我会向你们展示，这，和功能定理完全一致，现在你会怎么做呢？
Exactly the same idea, - and if you want to apply the work - energy theorem, of course, you will get exactly the same result.
完全一样，如果你想套用-，功能定理，会得到，完全相同的答案。
Availability analysis of energy is based on the reversible-work theorem.
可逆功原理是能量可用性分析的理论基础。
Maximum plastic work principle is an important theorem for analyzing plastic deformation which is a foundation to calculate deformation force with energy method.
最大塑性功原理又称第二塑性变分原理，在致密体塑性变形分析中是运用能量法进行变形力能计算的基础。
A theorem on kinetic energy for variable mass-point and formula of work of recoil internal forces are given and the reason of soft-rope query is discussed.
给出变质量质点的动能定理和一对反推内力作功的表达式，并由此给出软绳问题的正确解释。
A theorem on kinetic energy for variable mass-point and formula of work of recoil internal forces are given and the reason of soft-rope query is discussed.
给出变质量质点的动能定理和一对反推内力作功的表达式，并由此给出软绳问题的正确解释。
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