Ключевые слова: acceleration, assembly, atomic, balance, class, classroom, college, connecting, connections, demonstration, direction, education, electron, electronic, energy, equation, experiment, force, formula, friction, frictionless, institute, lab, laboratory, machine, measuring, metal, movement, network, object, physical, physics, power, principle, properties, pulley, research, resistance, rope, science, scientific, study, support, technology, test, theory, wave, weight,