घर्षण  हिन्दी देवनागरी में पढ़ें।

(angrezi:Friction) vah gun jisake karan do visham vastuon ke madhy pratirodhi bal utpann hota hai, jo ek vastu ko doosare ke sapeksh khisakane ka virodh karata hai, gharshan kahalata hai. vah bal jo sada vastu ki sambhavit gati athava khisakane ki disha men viparit kary karata hai, gharshan bal kahalata hai. do satah ke madhy sapeksh gati prarambh hone se poorv in satah ke madhy gharshan bal ko sthaitik gharshan kahate hain. jis samay satahon men sapeksh gati hoti hai, inake madhy gharshan bal ko gatij oorja gharshan kahate hain. gharshan tin prakar ke hote hain-

  1. sthaitik gharshan
  2. sarpi gharshan
  3. lotanik gharshan

sthaitik gharshan

yadi lakadi ka bada gutaka zamin par rakha ho aur use khisakane ke lie bal lagaya jae to vah nahin khisakata. atah donon satahon ke madhy ek gharshan bal kary karata hai. is gharshan bal ko hi sthaitik gharshan bal kaha jata hai. isaka pariman lagae ge bal ke barabar tatha disha bal ke viparit hoti hai.

sarpi gharshan

jab koee vastu kisi dharatal par sarakati hai to sarakane vali vastu tatha dharatal ke madhy lagane vala gharshan bal, sarpi gharshan bal kaha jata hai. jaise—bina pahie ki kisi gadi ko zamin par khinchane par gadi tatha zamin ke bich lagane vala bal sarpi gharshan bal hota hai.

lotanik gharshan

jab ek vastu doosari vastu ki satah par ludhakati hai to do satahon ke bich lagana vale gharshan bal lotanik gharshan bal kaha jata hain. jaise—sabhi vahanon ke pahiyon tatha zamin ki satah ke bich lagane vala gharshan bal lotanik gharshan bal hota hai.

gharshan ke karan hi manushy tatha janavaron adi ka satah par chalana sambhav ho pata hai. kar ya bas men brek lagane ke lie gharshan uttaradayi hai. gharshan badhane ke lie vahanon ke pahiyon ke tayaron men bahari satahen khanchadar bani hoti hain. sabhi mashinon men gharshan ke karan ooshma utpann hoti hai aur mashin ke kal–purje ghis jate hain. gharshan ko kam karane ke lie sparshi satahon ko kuchh snehakon ke upayog se chikana banaya jata hai. ghoomate shaphton ke bich gharshan bal ko kam karane ke lie balabeyaring ya shelar beyaringon ka upayog kiya jata hai. jo sarpi gharshan ko lotanik gharshan men badal deta hai. isake kuchh snehak bhi prayog kie jate hain. bhari mashinon men graiphait choorn ka prayog snehak ke roop men kiya jata hai.

gharshan gunank- do balon simant gharshan aur abhilamb pratikriya, ke anupat ko gharshan gunank kahate hain.

gharshan gunank

jahan = simant gharshan

= abhilamb pratikriya

gharshan gunank ka koee matrak nahin hota hai, kyonki yah do balon ka anupat hai.

gharshan kon- yah vah kon hai, jo simant gharshan tatha abhilamb pratikriya ka parinami abhilamb ke sath banata hai.


panne ki pragati avastha
adhar
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madhyamik
poornata
shodh

snbndhit lekh

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