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Don't know why but all "check-my-work" questions should not be considered off-topic:

Why do you do some exercises or questions?
Can you enhance your knowledge without them?
If you don't make mistakes and find them, then how will you learn?
Your flaws in conceptual understanding can be removed by doing what?
If you people are not willing to help someone remove his conceptual weaknesses then who'd (I am self learning usually.)?

Now "check-my-work" questions are considered off-topic, but I am saying that consider only those off-topic which are not useful to the wider audience, not the conceptual mistak-ed ones. I realize that mathematical error-ed questions are fit to be closed but some people are just so 'lakeer ka fakeer' they just see a "check-my-work" type, and then, close! Wait! Look and then decide. Please this is my request.

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    $\begingroup$ I'm a little bit unclear on what you're saying/asking here. $\endgroup$ – tpg2114 Apr 14 '15 at 16:27
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    $\begingroup$ Have you read the Meta post about "check my work problems"? It does explain there (rather nicely) why we consider them off-topic. $\endgroup$ – Kyle Kanos Apr 14 '15 at 16:33
  • $\begingroup$ @KyleKanos I did but did you read John's post? $\endgroup$ – RE60K Apr 14 '15 at 16:34
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    $\begingroup$ Yes, I did. It says, A blatant "spot my deliberate mistake" question is always going to be off topic with the caveat that we should determine if it was mathematical or conceptual. I've yet to see a conceptual "check my work" question posted on this site (but perhaps that's just me). $\endgroup$ – Kyle Kanos Apr 14 '15 at 16:36
  • $\begingroup$ Related post: physics.stackexchange.com/q/176113/2451 $\endgroup$ – Qmechanic Apr 14 '15 at 16:39
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    $\begingroup$ This has been discussed repeatedly. The user base of this site has said emphatically that this is not a homework help site. Telling us that we're doing it wrong when we are explicitly not doing what you want is pointless and counterproductive. On top of all the the pedagogical literature does not support your position and does support our policy of supporting basic conceptual conditions while not doing homework, $\endgroup$ – dmckee Apr 14 '15 at 17:17
  • $\begingroup$ Recent example of this question being put to explicit vote: meta.physics.stackexchange.com/a/5959/520 $\endgroup$ – dmckee Apr 14 '15 at 17:21
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    $\begingroup$ I've deleted some comments which constituted a nonconstructive argument. $\endgroup$ – David Z Apr 17 '15 at 7:25
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Physics.SE is not a homework help site, it is not meant to be a resource to teach people physics, and it is not a resource intended to help right conceptual misconceptions in students. When it was originally created, this site was meant to be a place where active physicists doing active research could come and ask/answer questions. It was intended to be a resource for physicists to be able to find answers to common questions they may want to ask. Much like how SO is most useful to programmers that are trying to program.

Since its creation, the population of Physics.SE has opened the site up to be more available to a broader audience. No longer is it specifically catering to professional physicists. The site is now a place where you can ask a question about physics, its concepts and explanations, and get an answer. We do enjoy it when we end up teaching something, however that is still not the objective. The objective is to answer physics questions that are broadly useful to physicists. If we choose to answer a question that roughly teaches the physics behind an everyday phenomenon or introduces the basic concepts of some advanced physics concept, that is our prerogative. And we expect that these answers will be useful in some way to active physicists. They may refresh concepts and ideas for those who are teaching them, remind others of stuff they learned long ago, or help out when a physicist is starting to research in a new area/field.

If we choose to answer a question such that the layman would benefit most from it, that is our prerogative as well. We have chosen to extend the range of usefulness to include offering a conceptual understanding to students and non-physicists, but there is no mandate for us to do this. The site is still primarily by physicists and of physicists and for physicists.

Many homework-like questions and, in particular, check my work questions can and very well may be helpful to students. We don't care. Our goal is not to teach students or ensure that they learn; it is to help physicists. Check-my-work questions do not help physicists, they only waste the time of the answerer. The question may be able to be reformed such that it is asking about the concepts of a problem, and that could help a physicist in teaching a class or brushing up on their own understanding. Even if the mistake is a conceptual error, the question is still only specific to students.

Even though it is possible that some of these questions could be reworked into a form that we'd find acceptable, the general form of check-my-work questions is undesirable and off-topic to us. Therefore, we want to discourage all of these questions from being posed in the first place. When someone posts such a question, the likelihood is that they do not know what the problem is, whether it is math or conceptual. If they see that some check-my-work questions are allowed because of what the resolution was, then, not knowing what theirs may be, they will always post their question and we will continue getting questions that are just plain wrong for this site. If they see that no check-my-work questions are allowed, at best they will not post their question at all and perhaps on average they will rework their question to fit into what we might consider an acceptable format.

Nevertheless, you must still keep in mind that no check-my-work questions, no matter the difficulty the OP has, are in line with the spirit of this site. We exist to provide physicists with a database of helpful questions and answers. We choose to also provide physical insight and explanations into common questions for the layman and students because we are very nice people, not because we have to. Most homework help questions have no use to physicists and so we do not accept most of them. Where we choose to draw the line in how much we will cater to non-physicists is entirely up to the collective body of users on this site. You cannot say we are wrong for choosing not to accept these questions. We have no requirement to help students with homework-like problems, so if we decide that we will not do so, the only thing to say is "Have it your way" and move on.

Summary: We aren't here to help students, so there's no use in being upset when we choose not to.

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    $\begingroup$ maybe someone didn't gave such an explanation; on Math-SE people help students, and on Math-Overflow people ask research level questions, but here this (PhySE) is the Overflow and there's no (Phy-Overflow).Anyways I did just misunderstood, if it's this way then this site is maybe not for me since I am only a student. $\endgroup$ – RE60K Apr 17 '15 at 15:32
  • $\begingroup$ @ADG Actually, there is a Physics Overflow (not affiliated with the SE network). It was started by ex members of this site that thought what we do now is still too far in catering to non-physicists. But Math.SE is a special case. They do math problems; that's their raison d'etre. So the help students solve homework problems that are all math. If a student has a homework problem that is all physics concepts, you'll find us willing to help. They do math, we do physics. They help with math, we help with physics. If the question is "check my work", it's probably math, not physics $\endgroup$ – Jim Apr 17 '15 at 15:54
  • $\begingroup$ But we don't talk about Physics Overflow $\endgroup$ – Jim Apr 17 '15 at 15:55
  • $\begingroup$ i forgot to account the centripetal/fugal force/ $\endgroup$ – RE60K Apr 17 '15 at 16:26
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    $\begingroup$ Then it probably could have been reworked into a form that is acceptable. I stand by my statement that "check my work" is unacceptable in all forms, but if your problem was a conceptual one, it should have been possible to ask it without the "check my work" overtones $\endgroup$ – Jim Apr 17 '15 at 16:29
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    $\begingroup$ what i was trying to tell everyone form the start "conceptual mistake=missing equation=regarding centripetal/fugal force" not a mathematical one. $\endgroup$ – RE60K Apr 17 '15 at 16:34
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    $\begingroup$ Conceptual or mathematical, "check-my-work" is off-topic and not accepted. The difference is that you can ask one with a conceptual difficulty in another way that is acceptable. But if asked as check-my-work, it's going to be treated that way. And being a radical change in meaning, we can't edit the question to make it acceptable, only you can $\endgroup$ – Jim Apr 17 '15 at 18:46
  • $\begingroup$ +1; I found this an interesting read. $\endgroup$ – Alfred Centauri Apr 18 '15 at 1:50

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