A rocket is a machine that operates on the principle of Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. Propulsion is generated by rapidly expelling mass, typically heated combustion gases, through a nozzle. The chemical reaction within the propulsion system generates high-pressure gas, and the controlled acceleration of this exhaust gas creates a forward thrust. This thrust allows the vehicle to achieve substantial velocity and maneuverability, enabling the transfer of kinetic energy over vast distances, often into the vacuum of space.