For example, no matter how much a dancer wishes to leap off the floor and then start turning, the law of conservation of angularmomentum absolutely prevents such a movement.
例如，无论一个舞者多么想要跳离地板，然后开始旋转，角动量守恒定律绝对阻止这样的动作。
2
The law of conservation of angularmomentum may be demonstrated with a gyroscope.
角动量守恒定律，可以用回转器来演示。
3
With a simple symmetrical electromagnetic field, the law of conservation of momentum and the law of conservation of angularmomentum for electromagnetic field and charges system are investigated.