i told you i chose the case of - a completely elastic collision-- q and so kinetic energy must be conserved.
我说我选择这个例子,它是完全弹性碰撞-,为0,q,is,zero--,那么动能必然守恒。
and i take a case whereby - i have a completely elastic collision-- 0 that means q is zero-- the kind that we have just discussed.
我采取这个例子,我有个完全弹性碰撞-,意味着q为-,这是我们刚讨论过的。
i「m going to try to make completely elastic collisions.
我将要尝试,完全弹性碰撞。
i will often call it a completely elastic collision, which is really not necessary.
我常叫它完全弹性碰撞,但其实并不需要这样叫。
now i want to do more completely elastic collisions, and i」m going to do that with the air track.
我还想做更多,完全弹性碰撞,我将用空气轨实验。
now i want to continue a case whereby i have a completely elastic collision.
我要继续此例,我有一个完全弹性碰撞。