Kinetic energy and momentum is a totally different thing.
动能和动量，是完全不同的概念。
Kinetic energy can be destroyed, but momentum cannot be destroyed in the absence of a net external force on the system as a whole.
动能可以被毁，但是动量不能，在整个系统外力，不存在情况下。
Nature can deal with kinetic energy one way or another, but it cannot finagle momentum.
自然可以应对动能，以这样那样的方式，但它却无法处理动量。
应用推荐