Dot product aur cross product, dono vectors ke beech ka relation batate hain, lekin kaam alag hai. Dot product ek scalar deta hai, jisme force aur displacement ki direction same hoti hai — isi se "work" pata chalta hai. Cross product ek vector deta hai, jahan force aur displacement perpendicular hote hain — yahi "torque" deta hai.
Main yeh tab samjha jab pitaji ki pension ki receipt check kar raha tha, aur dekha ki agar unki pen ki lakeer receipt ke line ke saath-saath chalti, to kaam aasaan hota (dot product). Lekin jab main apni behen ke college fees ka chakkar dar dar bhanta hoon, to lagta hai ki jindagi humesha perpendicular hi force lagati hai — saara mehnat torque ban jati hai, kaam nahi.
#work#career
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