This question. Until recent interface changes, I could see that the close reason stated that the question is about engineering, and hence is off topic, but an inquiry I made has shown that this reason is wrong, and a suggestion that it is, rather, too broad, was given instead.
As I can see, the answer to this question needs to consider 4 cases with varying speed and material, which is about as few cases as possible for the question to remain meaningful. But even then, it is not essential for an answer to formally list all four cases, as what is really being asked for is a qualitative characterization of the event, not the specific calculations. (I do claim this, based on the general nature of the question and the arbitrariness of examples asked about.) Then again, close reasons were recently adjusted across Stack Exchange, and there is no "too broad" reason anymore.
I find it difficult to justify why this question has to be closed. The reason given is faulty, there are no comments, the vote count is positive. I cannot see a fault so gross as to warrant the question being closed. Furthermore, there is a purpose to closing questions, and the formal reasons are there only to assist, not to define. Are we, the community, actually convinced that questions like this one have no place at Physics Stack Exchange? If so, can we give a reason?
We do not close questions we dislike — rather, we vote them down, and there are guide lines to that. Some questions could be eventually deleted by a script, but then again, there are clear rules. If a question is closed unjustly or mistakenly, it should be restored.
P.S. Hey folks, this is not a yes/no question, so if you are voting it down to express disagreement, you should leave a comment to point out what you disagree with in the first place.