Ключевые слова: balls, bounce, chromed, color, conservation of energy, cradle, dark background, elegant, energy, experiment, force, gravity, hitting, impacting, ingenuity, mathematics, metal, moment, motion, motion blur, newton, pendulum, perpetual, physics, red, redshift, science, scientific disclosure, scientific game, simon prebble, smooth background, speed, steel, temperature, theory, toy, universe, wooden base, yellow,