Ключевые слова: balance, balls, bounce, business, businessman, collision, concept, conservation, constant, copy space, cradle, crop, effect, energy, experiment, force, glass, gravitation, gravity, hanging, horizontal, idea, infinite, kinetic, looking, loop, metal, model, momentum, movement, newton, newton cradle, observe, observing, pendulum, perpetual, physics, precise, pulling, reaction, reflection, science, shiny, sphere, studio shot, swing, swinging, symbol, table, unrecognizable,