Newton's third law (law of reaction) states that 'when one body exerts a force on a second, the second body exerts a reaction force that is equal in Answer Question 3[input] and opposite in direction on the first body'. NOTE: the answer is a single word and the spelling must be correct. Please double check spelling.

Question

BlackTom AI · Accepted Answer

The prompt describes Newton's third law, which states that the force exerted by one body on a second is matched by a reaction force that is equal in magnitude and opposite in direction.

Since the question asks for a single word that completes the sentence and emphasizes the closeness of the two forces, the correct term is magnitude. Magnitude refers to the size or strength of the force, without regard to direction.

Why magnitud e is correct: The standard wording is ‘equal in magnitude and opposite in direction’, which precisely mirrors the law’s claim about the forces having the same strength.

Why not ‘force’: If you used ‘force’ instead of ‘magnitude’, you would be describing what the pair has in common (they are both forces) but not specifying that their strengths are equal. The word ‘force’ would blur the intended quantitative equality between the two reacting forces.

Why not other potential terms: In this context there aren’t other standard single-word candidates to fit the exact phrase; the key contrast is between the size of the forces (magnitude) and their direction, which is opposite. The correct scholarly terminology is magnitude, which ensures the sentence remains precise and scientifically correct.

Additionally, the instruction about spelling is satisfied by the standard spelling magnitude, avoiding any variations or misspellings.

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