Video narration
Jab aap zameen ko neeche dhakka dete hain, to aap upar kaise uth jaate hain? Koodte samay aapke pair zameen ko neeche dabaate hain. Usi pal, bina deri ke, zameen aapke pairon ko upar dhakka deti hai. Yahi Newton's third law hai: har dhakka doosre pind se barabar taakat ka, vipreet disha wala dhakka paata hai. Dono forces equal and opposite hain. To ye cancel kyon nahin hote? Kyonki ek bal zameen par lagta hai, aur doosra aap par. Aap zameen ko neeche dhakelte hain; zameen aapko upar dhakelti hai. Alag vastuon par lagne wale ye bal, ek hi vastu par shoonya nahin bante. Isliye equal and opposite ka arth yah nahin ki har vastu par net force shoonya hai. Action-reaction pair pahchaanne ka niyam: ek hi interaction mein, dono bal alag vastuon par ek saath lagte hain. Jawaab: zameen aapko upar dhakelti hai, jab aap use neeche dhakelte hain.