Answer :
Final answer:
Rockets propel forward by expelling gas backward through the principle of thrust based on Newton’s third law of motion.
Explanation:
Rockets work by pushing exhaust gases out the back. According to Newton's third law of motion, when a rocket exerts a force backward on the gases, the gases exert an equal force forward on the rocket. This force that pushes a body forward in response to a backward force is known as thrust.
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