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  1. G

    Unanswered questions in Classical Mechanics?

    A very possible explanation: magnetophosphenes
  2. G

    How to show that a trajectory is closed?

    Main question in the title. I did a group work in analytic mechanics about pendulum in rotating reference frame and stumbled upon this one: link, page 22. Does this always hold? In my solution, there are two coordinates with the same frequency (different amplitudes) but asymmetrical in...