There has been a lot of discussion in the past in regard to this.
And a page Physics homework questions on Area51.
On that page you will find a suggestion, to change the name of the site to Physics Learners.
I think this is a very good idea to keep well understood and text book level physics separate from current research topics.
The precise details may arrived at through a discussion, however what you think of the general premise of the idea.
Edit 1: This is an example of the kind of questions that I definitely want to separate out.
Just an example, I hope it will help making my point.
Please note technically this is not a homework question.
Which is not to say this is a bad question, I am sure everyone has asked that at some point in their life. But really is a distraction to a research community.
Edit2: If we make a new site, question such as this one would have receive ample attention, as it would stay on the main page for much longer and so on, it would not be lost in a flood of questions of the former type.