Given the enormous canon of physics problems and puzzles, it can be hard to track down the authors for some original problems. Some problems are so well used, the original questioner has long been buried by ubiquity.
Where a problem shows an acknowledgment, this will refer to the person/site/other than made me aware of the question, and not necessarily the inventor of the question.
Where a problem shows no acknowledgment, this means one of three things: 1. It is so well established in the canon of physics problems, that acknowledging the creator is not possible. 2. It is a problem I remember but did not create myself, and cannot recall where I first heard it. Or 3. It is a problem I have invented myself.
If you have any interesting problems you would like to submit, or believe you should be acknowledged as providing one of the problems already featured, please get in touch via the contact page!