Force of this nature is only appropriate if the person constitutes a danger to himself, or others. This child did not. In addition, a cop should never act out of anger, which is what this cop did. The cop could have permanently injured the girl, who was passively resisting. (In fact, the cop almost injured the kid sitting behind her). While she is obviously a problem child who should be removed from the school, there are many other ways to do that other than by tossing her around the room like a rag doll.