来自《耶鲁大学开放课程：基础物理 第8集 第8集》
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times v0 is the change in the velocity of the rocket.乘以 v0 就是火箭速度的变化量 -
Okay, so I have to give you some more ammunition好的 我要教给你更多知识 -
to do your homework problems;让你能够解决作业中的问题 -
so, I'm going to discuss the last and final topic,我将要介绍最后一个话题 -
which is the subject of collisions.也就是碰撞 -
So, we're going to take the collision of two bodies,我们考虑两个物体的碰撞 -
one body, another body, m1, v1, m2, v2,一个物体 另一个物体 m1 v1 m2 v2 -
they collide.这两个物体碰撞 -
At the end of the day,最后 -
you can have the same two bodies你将得到这两个物体 -
moving at some velocities v1', v2'.速度分别变为 v'1 和 v'2 -
Our goal is to find the final velocities;我们的目标是找到末状态时的速度