'न्यूटन का द्वितीय नियम' (Newton's Second Law):

उत्तर: (B) Force = Mass × Acceleration (F=ma) — F=ma. More force → more acceleration. More mass → less acceleration (for same force). Unit of force: Newton (N). 1N = 1kg × 1m/s². Example: kicking a football (light) vs a stone (heavy) with same forc...