Newton's third law can be derived from:
Correct answer: B. Newton's second law
- A. Newton's first law
- B. Newton's second law
- C. Both Options A and B are correct
- D. They are unrelated
Explanation
Newton's second law provides a mathematical description of force as it relates to mass and acceleration, forming the basis for understanding interactions between objects. From these interactions, Newton's third law can be derived, stating that for every action, there is an equal and opposite reaction. Newton's first law does not offer this mathematical basis, as it focuses solely on the state of motion without external forces. The option suggesting they are unrelated is incorrect, as Newton's laws collectively describe motion and force interactions. Thus, the correct answer is option B.
This question appeared on the ETEA MDCAT 2016 paper, which you can sit online with every answer explained.
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About Newton's Laws of Motion
Newton’s laws explain inertia, the relation between net force and acceleration, and action-reaction pairs. Questions involve free-body diagrams, balanced and unbalanced forces, F = ma, force as the rate of change of momentum, and identifying genuine third-law pairs, which act on different bodies.
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