EngineeringSurya · Class 2-3
Kaagaz ka pul, sikke ka wazan
Ek patla kaagaz do kitaabon ke beech rakho — kya woh ek sikka utha payega?
Socho pehle… phir dekho jawab
Seedha kaagaz toh jhuk jaata hai! Par usi kaagaz ko accordion ki tarah zig-zag mod do, toh woh kai sikke utha leta hai.
Engineer woh log hain jo pul, ghar aur sadak banate hain. Unka ek bada raaz hai — shape badlo, taakat badal jaati hai.
Kyun zig-zag kaagaz majboot hai? Kyunki har mod ek chhoti deewar jaisa khada hota hai. Wazan ek jagah nahi, kai modon mein baant jaata hai.
Isiliye gatte ke dabbe ke andar bhi lehardaar kaagaz hota hai. Woh halka hai, par majboot. Bade pul bhi triangle aur mehraab jaisi shapes se banaaye jaate hain, taaki woh gaadiyon ka bhaari wazan utha sakein. Agli baar pul dekho, toh uski shape pe dhyaan dena!
Ghar pe try karo
Do kitaabein thodi door rakho. Upar ek seedha kaagaz rakho aur ek sikka rakho — kya hua? Ab kaagaz ko pankhe ki tarah zig-zag modo aur dobara rakho. Ek-ek karke sikke rakho aur gino!
Wow!
Wahi kaagaz, bas mod diya — aur woh kai guna zyada wazan utha leta hai!
Mummy-Papa ke liye
Aaj ghar ki do kitaabon aur ek kaagaz se pul banwaiye, aur ginti karwaiye ki kitne sikke tike.
3 sawaal
- Kaunsa kaagaz ka pul zyada sikke uthata hai?
Jawab dekho
Zig-zag moda hua. Zig-zag modon mein wazan baant jaata hai, isliye woh majboot hota hai.
- Engineer kya banate hain?
Jawab dekho
Pul, ghar aur sadak. Engineer pul, ghar, sadak jaisi cheezein design karke banate hain.
- Gatte ke dabbe ke andar lehardaar kaagaz kyun hota hai?
Jawab dekho
Majboot banane ke liye. Lehardaar shape dabbe ko halka par majboot banati hai.
NCERT se jodo: NCERT Foundational/Preparatory Stage — hamare aas-paas (cheezein banana)