recently I had one problem here, and in comments I got interesting thing written by user Sofia. Unfortunetly, the topic is in hold now and I can't ask her more.
Here is the comment:
Radio-activity would help? Your class heard - I suppose - of substances as Uranium, Plutonium, and others, that emit electrons, alpha-particles., etc. But the nuclei of these atoms create an electric field around themselves, and the potential energy of this field is much higher tan the total energy of the emitted particle. We know that equality: total energy = kinetic energy + potential energy. So, the non-Newtonian behavior is that when passing through this field, the kinetic energy of the emitted particles is NEGATIVE.
Why is it negative?