gravitational field can create energy.. electrons going up a conductor gain free gravitational potential energy... I thought you were studying physics??? I haven't finished with physics yet.
if 2 ions are moving parallel with different speeds then that hooper force might come to play...
2 beams of charges having different parallel velocities then there's a force that attracts the beams together.
even if energy can't be created and then if the electrons and other subatomic particles can't be attracted to earth is because they're not dielectrics, what is gravity? (not what textbooks say)