What is broken on my lens?

Today someone punched my Nikkor 55-200 non-VR lens. The focus was set to autofocus and was fully extended. There was a cracking noise. When i turned the camera on, it wouldn't autofocus. I put in on manual focus, and the movement was not smooth like it used to be; it locks and jams halfway through and just before being all the way extended or retracted.
Details

Quite a lot of the internal workings of the lens have come dislodged. Keep different company

Not good. I'd have to say something mechanical is either mis alligned or has broken. Either have the lens looked at or replace it.

First, immediately call the police and file a vandalism charge against that person, then send everything off to Nikon for repair. After that present the repair bill to the person who did the damage. If they don't pay, sue them in court.