Saturday, 22 August 2020

newtonian mechanics - Why is Newton's third law known as *weak law of action and reaction*?


This link shows the extra requirements for strong law of action and reaction. Why is Newton's third law known as weak law of action and reaction? Is the strong law of action and reaction not Newton's third law? But while working with central forces we apply Newton's third law (which is known as weak law) and not specifically strong law of action and reaction. At least I never heard people saying like "from the strong law of action and reaction the two forces are equal and opposite", they say "from Newton's third law..." . Why is it not something like "there are two categories under Newton's third law- weak law and strong law"? What is the difference?




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