Meaning & use
Newton's third law
The physics principle stating that for every action force, there is an equal and opposite reaction force.
See it in a sentence
Newton's third law explains why a rocket is pushed forward as gas shoots out behind it.
The teacher used a skateboard demonstration to illustrate Newton's third law.
A note on using this word
One of Isaac Newton's three laws of motion; often summarized as "for every action, there is an equal and opposite reaction."
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