Motion ke types

Position aur reference point

Koi cheez kahan hai, ye batane ke liye hum use kisi tay cheez ya jagah se naapte hain, jise reference point kehte hain. Chapter mein Deepa aur uske dost behas karte hain ki school paas hai ya garden, aur sab sahi hain, kyunki har koi alag ghar se naap raha hai. Agar sab bus stand se naapte, to sab ek baat kehte. Sadak par ‘Delhi 70 km’ likha kilometre stone, Delhi ko reference point maankar tumhari position batata hai.

Motion aur rest

Koi cheez motion mein hai agar uski position reference point ke hisaab se samay ke saath badalti hai. Wo rest mein hai agar uski position samay ke saath nahi badalti. Jab Padma ki bus ‘Delhi 70 km’ aur baad mein ‘Delhi 60 km’ waale stone se guzarti hai, to Delhi ke hisaab se uski position badal rahi hai, yaani wo Delhi ki taraf chal rahi hai.

Jawab reference point tay karta hai. Bus ke andar baithe yaatri apni jagah par rehte hain, isliye wo bus ke hisaab se rest mein hain. Bahar ki building se milaao to wahi yaatri aur bus motion mein hain. Book ek paheli bhi deti hai: shaant samudra par ek jaisi raftaar se seedhi line mein chalte, bina khidki ke jahaaz mein, kya pata kar sakte ho ki wo chal raha hai? NCERT solutions dekhne se pehle socho.

Linear motion

Jab koi cheez seedhi line mein chalti hai, to uski motion linear motion hai. Udaharan: oonchaai se giraaya rubber, ped se girta santra, farsh par dhakela gaya bhaari dabba, seedhi sadak par car, aur march-past mein students.

Circular motion

Jab koi cheez gol raaste par chalti hai, to uski motion circular motion hai. Rubber ko dhaage se baandhkar ghumaao: wo merry-go-round ki tarah gol-gol ghoomta hai. Giant wheel aur ceiling fan ke blade ki nok iske aur udaharan hain.

Oscillatory motion

Jab koi cheez ek tay jagah ke aage-peeche chalti hai, to uski motion oscillatory motion hai. Rubber ko dhaage se latkaao, thoda ek taraf le jaakar chhod do: wo jhoole ki tarah aage-peeche jhoolta hai. Dhaatu ki patli patti ka ek sira table par dabaakar rakho, doosra sira neeche dabaakar chhodo: wo sira upar-neeche hota hai, ye bhi oscillatory motion hai.

Periodic motion

Agar koi cheez ek tay samay ke baad apna raasta dohraaye, to uski motion periodic hai. Circular motion mein cheez baar-baar wahi gol raasta lagaati hai, aur oscillatory motion mein baar-baar aage-peeche hoti hai, isliye dono periodic hain. Jaise deewar ghadi ka pendulum har baar utne hi samay mein ek baar aage-peeche ka chakkar poora karta hai, aur ghadi ki suiyan bhi tay samay mein apna chakkar dohraati hain.

Park aur track par motion

Bachchon ke park mein seedhi slide par fisalta bachcha linear motion dikhaata hai, merry-go-round circular motion, aur jhoola ya see-saw oscillatory motion. Ek hi cheez raaste mein apni motion ka type badal bhi sakti hai, jaise rollercoaster track par gend:

Lambaai aur doori naapne ke liye padho length ki standard units. Textbook ke sawaalon ke liye dekho Chapter 5 ke NCERT solutions; poore chapter ke liye Chapter 5 ke notes.