Which physical theory explains the generation of thrust by rocket engines, jet engines and deflating balloons?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. Newton’s laws of motion.
The physical theory that explains the generation of thrust by rocket engines, jet engines, and deflating balloons is Newton's Third Law of Motion.
In a rocket engine, fuel is burned and expelled out of the nozzle at high speed. The action of the exhaust gases being ejected creates an equal and opposite reaction that propels the rocket forward.
Jet Engines: Jet engines work on the same principle. Air is drawn in, compressed, mixed with fuel, and ignited. The high-speed exhaust gases are expelled, creating thrust that pushes the jet forward.
Deflating Balloons: When a balloon is deflated, air rushes out through the opening. The action of air being expelled results in a reaction force that pushes the balloon in the opposite direction.