3rd law of motion explains______________________?
Correct answer: D. existence of pair of forces in nature
- A. effect of force
- B. existence of a force
- C. existence of two forces
- D. existence of pair of forces in nature
Explanation
Newton's third law states that forces occur in equal and opposite pairs between interacting bodies. These two forces act on different bodies, so the law explains the existence of pairs of forces in nature. The likely mistake is choosing 'effect of force', which is mainly associated with Newton's second law.
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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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