They get stuck together because it's a completely inelastic collision.
它们粘在一起，这是完全非弹性碰撞。
We lose kinetic energy when there is a completely inelastic collision.
我们失去了动能，这是完全非弹性碰撞。
And so now I will do the timing in exactly the same way that I did before, except that now I have a completely inelastic collision.
我开始计时，用和原来一样的方法，只是我现在做的是，完全非弹性碰撞。
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