Which law of motion is also called law of inertia ?
Correct answer: A. 1st law
- A. 1st law
- B. 2nd law
- C. 3rd law
- D. all 1st, 2nd and 3rd laws
Explanation
Newton's first law states that an object remains at rest or continues with uniform velocity unless acted on by a net external force, expressing the principle of inertia. Option a is correct; option b is a likely mistake because the second law concerns force and acceleration, not resistance to changes in motion.
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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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