Newton's first law of motion is essentially a statement about
Correct answer: B. inertia, the tendency of a body to resist a change in its state of motion
- A. the acceleration produced by a force
- B. inertia, the tendency of a body to resist a change in its state of motion
- C. action and reaction pairs
- D. the conservation of energy
Explanation
A body continues at rest or in uniform motion in a straight line unless a resultant force acts, so the law defines what a force actually does: it changes motion rather than maintaining it. Mass is the measure of that inertia. This is why a passenger lurches forward when a bus brakes suddenly.
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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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