I know there are many Physics enthusiasts on Astronomy SE. I would invite them to have a look at the new site proposal on Area 51
Presently Physics SE isn't meant for problem-solving. It is more about specific physics concepts. The new site wishes to be what Physics SE isn't i.e. a platform to discuss various ways of solving a problem and helping users find out their mistakes while solving. See the meta post on Physics SE to get a better idea.
At the moment we lack followers on the proposal. But I think it can be a successful site. Do have a look and leave your suggestions on the meta post. Thank you.