Question : Which physical theory explains the generation of thrust by rocket engines, jet engines and deflating balloons?
Option 1: Newton's laws of motion
Option 2: Exclusion principle
Option 3: Faraday's laws of electromagnetic induction
Option 4: Laws of thermodynamics
Correct Answer: Newton's laws of motion
Solution : The correct option is Newton's laws of motion.
Newton's Third Law of Motion explains thrust generation. For rockets, burning fuel accelerates gases downward, propelling the rocket upward. In jet engines, air is drawn in, compressed, mixed with fuel, and ignited, producing a backward expulsion of gases, propelling the jet forward. Similarly, deflating balloons push air backwards, causing forward motion, adhering to Newton's law of action and reaction.
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