Ключевые слова: action, background, balance, ball, bouncing, business, closeup, concept, conservation, cradle, demonstrative, design, device, educational, effect, element, energy, focus, gravity, hand, hanging, impact, kinetic, law, leadership, light, male, man, metal, momentum, motion, movement, newton, office, pendulum, person, physics, playing, push, reaction, row, science, selective, sphere, success, swing, table, toy, work,