PhysicsSurya · Class 2-3
Patli patti chubhe, chaudi patti nahi: dabaav ka raaz
Kabhi socha hai? Riya ke purane bag ki patli patti kandhe mein chubhti thi. Naye bag mein wahi kitaabein, par chaudi patti — aur kandha khush! Kyun?
Socho pehle… phir dekho jawab
Kitaabon ka wazan wahi tha. Par chaudi patti ne wazan ko zyada jagah par baant diya. Ek jagah par kitna zor lagta hai — ise dabaav kehte hain.
Zor wahi, jagah chhoti — dabaav zyada. Zor wahi, jagah badi — dabaav kam. Isliye patli patti chubhti hai aur chaudi patti aaraam deti hai.
Isliye pin aur keel ki nok nukeeli hoti hai: saara zor ek nanhe bindu par, aur keel aasaani se lakdi mein ghus jaati hai. Oont ke chaude pair ret mein kam dhanste hain.
Paani bhi dabata hai. Bottle mein upar paani bhara, phir neeche ke paani par upar ka bojh aaya, isliye neeche ka chhed sabse door dhaar phenkta hai.
Humne kya kiya :- Patli aur chaudi patti ko milaya, aur bottle ke chhed dekhe.
Isse kya hua :- Samjhe ki dabaav = kitna zor, kitni jagah par; aur paani gehrai mein zyada dabata hai.
Ghar pe try karo
Bade ke saath gili mitti ka ek gola chapta karo. Ek baar ungli ki nok se, ek baar poori hatheli se halka sa, ek jaisa dabao. Kahan gehra gaddha bana? Copy mein chitra banao.
Wow!
Tractor ke tyre bahut chaude hote hain, taaki bhaari tractor naram khet ki mitti mein na dhanse!
Mummy-Papa ke liye
Aaj bachche ke saath gili mitti par ungli ki nok aur hatheli se dabaa kar dekhiye ki dabaav jagah se kaise badalta hai.
3 sawaal
- Bag ki kaunsi patti kandhe ko zyada aaraam deti hai?
Jawab dekho
Chaudi patti. Chaudi patti wazan ko zyada jagah par baant deti hai, isliye dabaav kam lagta hai.
- Keel ki nok nukeeli kyun hoti hai?
Jawab dekho
Saara zor chhoti jagah par aaye, aasaani se ghuse. Chhoti jagah par zor = zyada dabaav, isliye nukeeli keel aasaani se ghusti hai.
- Paani se bhari bottle mein kaunsa chhed sabse door dhaar phenkta hai?
Jawab dekho
Sabse neeche wala. Neeche ke paani par upar ka bojh hota hai, isliye wahan dabaav sabse zyada.
NCERT se jodo: NCERT Class 3 — hamare aas-paas: dhakka, kheench aur cheezon ka wazan (idea in words)