And when kinetic energy isn’t conserved, that’s an inelastic collision.

当动能不守恒时， 这就是非弹性碰撞。

So, now we know about both elastic and inelastic collisions.

所以，现在我们有关于两者的信息 柔软而有弹性的凹凸。

And when kinetic energy isn't conserved, that's an inelastic collision.

当动能不守恒时， 这是软碰撞。

But there’s also such a thing as a perfectly inelastic collision, because... of course there is.

但也有完全非弹性碰撞这样的事情， 因为… … 当然有。

Instead, a perfectly inelastic collision is what happens when objects stick together.

相反，碰撞发生完全是软的 当两个身体粘在一起时。

But there's also such a thing as a perfectly inelastic collision, because... of course there is.

但是有一种完美的软碰撞， 因为… … 当然有。

We also talked about the differences between elastic and inelastic collisions, and how to calculate the center of mass of a system.

我们还讨论了弹性碰撞和非弹性碰撞之间的区别，以及如何计算系统的质心。

So, it is not a collision where the objects lose all of their kinetic energy. Instead, a perfectly inelastic collision is what happens when objects stick together.

因此，这不是物体失去所有动能的碰撞。相反，当物体粘在一起时会发生完全非弹性碰撞。