To. Wew
Yes, you are right.
Although “11km/s 이상으로 되어서 지구를 벗어나죠” does not have to be.. But I know what you were trying to say.
For instance, the fast moving satellites around Earth needs only 7km/s to stay in orbit.
If that satellite changes direction and adds only little bit of boost, it will go out of Earth orbit.