PhysicsSurya · Class 2-3
Hawa ka chhupa haath
Ek khula kaagaz aur ek gola kiya hua kaagaz saath giraoge, toh pehle kaun girega?
Socho pehle… phir dekho jawab
Gola wala kaagaz pehle girta hai! Khula kaagaz dheere-dheere lehraata hua aata hai, kyunki hawa usse neeche se rok leti hai.
Hawa dikhti nahi, par woh hamare chaaron taraf hai. Jab koi cheez girti hai, hawa uske raaste mein aa jaati hai.
Kyun? Kyunki khule kaagaz ki surface badi hai. Badi surface zyada hawa se takraati hai, toh hawa usse zyada rokti hai. Gola chhota hai, isliye hawa usse kam rok paati hai.
Parachute bhi yahi karta hai. Bada sa kapda khulta hai, bahut saari hawa pakadta hai, aur cheez aaraam se neeche utarti hai. Pankh aur sookha patta bhi isi wajah se lehraate hue girte hain. Agli baar ped se patta girte dekho, toh hawa ka yeh chhupa haath yaad karna!
Ghar pe try karo
Do ek jaise kaagaz lo. Ek ko khula rakho, ek ka gola banao. Mummy-papa ke saath khade hokar dono ko ek saath chhodo. Dekho kaun pehle zameen chhoota hai. Phir khule kaagaz ko aadha mod ke try karo!
Wow!
Hawa dikhti nahi, par itni taakat rakhti hai ki bade-bade parachute ko bhi dheere utaar deti hai.
Mummy-Papa ke liye
Aaj do kaagaz se yeh race karwaiye, aur bachche se poochiye: 'Kyun ek dheere gira?'
3 sawaal
- Kaunsa kaagaz dheere girta hai?
Jawab dekho
Khula kaagaz. Khula kaagaz zyada hawa pakadta hai, isliye dheere girta hai.
- Parachute ka bada kapda kya pakadta hai?
Jawab dekho
Hawa. Kapda hawa pakadta hai, aur hawa girne ki speed kam kar deti hai.
- Hawa ke baare mein kya sach hai?
Jawab dekho
Hawa dikhti nahi, par hoti hai. Hawa hamare chaaron taraf hai, bas aankhon se nahi dikhti.
NCERT se jodo: NCERT Class 3 — hamare aas-paas (hawa)