The "Classic" Physics Problems. In my physics education/career I have often heard people refer to the "classic" such and such a problem or to the "typical" or "archetypal" physics problems. These are the problems/models that many/most university physics problems seem to reduce down to, no matter the particular context of the problem. I thought it'd be interesting to ask a forum such as this, with so many physicists of different levels of experience and areas of specialization, what a list of these problems would like. So imagine if a student stopped you and asked "What are the classic problems of physics?" My own thoughts (so far) have offered: 1) Collisions between two bodies. 2) Classical simple harmonic oscillator 3) Quantum harmonic oscillator 4) Body moving through a central potential. 5) A "Blackbody" type of calculation (like a Fermi gas) Look forward to seeing some interesting suggestions/discussion.