I'm confused as to why the question Falling to Earth from orbit was closed as a "homework-like" question. I don't know whether the OP found our advice about asking homework(-like) questions before posting; but if they had, they would have found the following advice:
"[N]arrow down the problem to the particular concept that's giving you trouble and ask about that specifically." The OP did that: they realized that the needed to integrate the force with respect to time, but that the force itself depended on the position, and they couldn't see how to address that.
"The best way to produce a focused, specific question is to show your work." The OP provided their work up that had led to their point of confusion.
"Reference the source". There's no source referenced, but this seems to be a question that occurred to the OP on their own, so this may be moot.
"Use the homework-and-exercises tag." Fair enough, they didn't do that; it was edited in later. I doubt this was the reason for closure, though.
In other words, this seems to fulfill the criteria listed there. I'm not sure that the OP could have asked the question much better than they did (except for the braggy "top-20 university" stuff at the top, but hopefully we can let that slide.)
More broadly speaking, it seems to me that any question that looks the least bit homework-like is quickly closed, even if it asks about conceptual problems and is more than just a PSQ. This doesn't seem to be consistent with our stated policies around such questions, which imply that there is a good way to ask such questions. Have these policies changed? Should our close reason be updated accordingly?
I don't mean to poke the bear here. I'll admit I'm something of a noob around here compared to many users, and that there was plenty of discussion about the homework policy predating my time here. And I'm definitely mindful of the problems that would arise if we let pure PSQs get answered as a matter of course. But at the same time, it is frustrating to see people who come to this site asking interesting, thoughtful questions getting shut down summarily.