Question

If Newton’s 3rd law of motion is written in the form F21 = F12; what is
the mistake?

Answer 1

Answer:

If Newton's 3rdLaw of Motion is written in the form of F21 = F12; what is the mistake? It should be here. This shows that force on a body A by B is equal an opposite to the force on body by A. Hence, the forces of action and reaction are equal and opposite, which proves Newton's 3rd law of motion.

Explanation:

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Answer 2

Newtons 3rd law of motion states that "the force of action and reaction are same but one is opposite to another" ie F1 = -F2

So the mistake is it should be F21 = - F12