I have the same objection to this that dmckee had last time we talked about this.
Essentially, everybody who posts a question on this site wants a problem solved. The problem may be lack of understanding, or it may be homework, or it may be just about anything else. But the very existence of a question implies there is a problem to be solved, and such a tag would then apply to everything under the sun.
I would rather see the meta tag go away entirely and we downvote bad "homework-like" questions into oblivion and close them just as fast as we are now. There's no need for a tag to point out garbage.
The "good" questions (ie. the ones that already conform to the policy) don't need a separate tag to tell us that they conform to the policy. They will be well-posed questions looking for conceptual explanations and thus no different from any other good question.
I don't think the close reason needs to say "Homework like ..." nor "Problem solving ...", it could simply say:
Questions should ask about a specific physics concept and show some effort to work through the problem. We want our questions to be useful to the broader community, and to future users. See our meta site for more guidance on how to edit your question to make it better
which then means that close reason can apply to all of the really bad questions that come in and make no sense nor effort to justify them. It's kind of a "non-mainstream" close reason for mainstream topics. We want all of our questions to be about specific physics concepts -- that's part of what makes us unique from World Building.SE. We close questions that start "Imagine if the sun instantly disappeared..." as non-physical, so this kind of close reason would work for that as well as "A ball is rolling down a 45 degree ramp..."
Regarding the help center, I would say it doesn't need changed because we do want to forbid homework questions as they are defined there. And we want to forbid bad questions as defined elsewhere in the help center.
