Ключевые слова: applied, balls, cartesian, channel, charge, conservation, electric, energy, equipment, experiment, field, globes, gutter, hang, impetus, impulse, inertia, law, line, linear, magnetic, many, mechanics, metallic, nobody, obgects, phisics, physical, physics, polished, problem, row, scince, set, showing, spheres, system, theoretical, tools, trick, trough, visual, wave,