mexanika

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13 mexanika k.p.abduraxmanov, v.s.xamidov 4 – ma’ruza fizika kafedrasi 2018 fizika i 1 2 ma'ruza rejasi qattiq jism aylanma harakati. kuch momenti. impuls momenti. impuls momentining saqlanish qonuni. qattiq jism aylanma harakat dinamikasi. qattiq jism aylanma harakati dinamikasining asosiy tenglamasi. inersiya momentini hisoblash. shteyner teoremasi. 3 qattiq jism aylanma harakati. kuch momenti qattiq jism aylanma harakat dinamikasining asosiy kattaliklari – kuch momenti va impuls momenti tushunchalari bir – biri bilan chambarchas bog‘liqdir. kuch momenti nuqtaga nisbatan bo‘lsa, impuls momenti o‘qqa nisbatandir. kuch momenti aylanish markaziga nisbatan bo‘lgani uchun vektor kattalikdir. impuls momenti o‘qqa nisbatan bo‘lgani uchun vektor kattalik bo‘lmaydi. 00 aylanish o‘qiga o‘rnatilgan qattiq jismga ixtiyoriy tashqi kuch ta’sirini ko‘rib chiqaylik. aylanish o‘qida 0 bosh nuqta yoki qutbni belgilab olamiz. tizimning massa markazidan o‘tgan 00 o‘qqa maxkamlangan jismning, shu o‘qdan r masofada joylashgan qandaydir a nuqtasiga istalgan yo‘nalishda kuchni qo‘yamiz. bu kuch vektori bilan ustma-ust tushgan chiziqni kuchning ta’sir chizig‘i …

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aga nisbatan a moddiy nuqtaning impuls momenti radius – vektorning moddiy nuqta impulsiga vektor ko‘paytmasiga teng fizik kattalikka aytiladi: o 8 impuls momenti berilgan o‘qqa nisbatan qattiq jismning impuls momenti alohida zarrachalarning impuls momentlari yig‘indisiga tengdir: 9 impuls momentining saqlanish qonuni yopiq tizimning impuls momenti vaqt o‘tishi bilan o‘zgarmasdir: berilgan o‘qqa nisbatan qattiq jismning impuls momenti shu o‘qqa nisbatan jism inersiya momentining burchakli tezlikka ko‘paytmasiga tengdir. 10 impulsning saqlanish qonuni ihtiyoriy zarrachalar tizimini olaylik. alohida zarrachalar impulslarining vektor yig‘indisi sifatida tizimning impulsi tushunchasini kiritamiz vaqt bo‘icha integrallaymiz nyutonning ikkinchi qonunini qo‘llash orqali quyidagiga ega bo‘lamiz yopiq tizimning impulsi vaqt o‘tishi bilan o‘zgarmasdan qoladi. 11 qattiq jism aylanma harakati dinamikasi moddiy nuqta impulsining aylanish o‘qiga nisbatan inersiya momenti uning massasini aylanish radiusi kvadratiga ko‘paytmasiga teng bo‘lgan fizik kattalikdir. aylanish o‘qiga nisbatan tizimning inersiya momenti n moddiy nuqtalari massalarining ko‘rilayotgan o‘qqacha bo‘lgan masofalari kvadratlari ko‘paytmalarining yig‘indisiga teng fizik kattalikdir. inersiyaning bosh momenti …

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arga nisbatan inersiya momenti shteyner teoremasi orqali aniqlanadi: istalgan z o‘qqa nisbatan jismning inersiya momenti j jismning c massa markazi orqali o‘tadigan parallel o‘qlarga nisbatan inersiya momenti va m jism massasining o‘qlar orasidagi masofaning kvadratiga ko‘paytmasi yizindisiga tengdir: 15 16 radiusi r bo‘lgan ingichka uzukning inersiya momentini hisoblash 17 sterjenning o‘rtasidan o‘tuvchi o‘qqa nisbatan inersiya momentini hisoblash 18 silindrning z (markazidan) o‘qidan o‘tuvchi o‘qqanisbatan inersiya momentini hisoblash 19 ilgarilanma va aylanma harakatlarning asosiy kattaliklari ilgarilanma harakat aylanma harakat massa m inersiya momenti j ko‘chish burchakli ko‘chish tezlik burchakli tezlik tezlanish burchakli tezlanish kuch kuch momenti impuls kuch impulsi ish ish kinetik energiya kinetik energiya dinamikaning asosiy tenglamasi dinamikaning asosiy tenglamasi 20 foydalanilgan adabiyotlar 1. q.p.abduraxmanov, v.s.xamidov, n.a.axmedova. fizika. darslik. toshkent. 2018 y. 2. k.p.abduraxmanov, o'.egamov “fizika”. darslik. toshkent. 2013 y. 3. q.p.abduraxmanov, o’.egamov. “fizika”. darslik. toshkent. 2015 y. 4. douglas c. giancoli. physics. principles with applicathions. 2004 usa isbn-13 978-0-321-62592-2. …

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13 mexanika k.p.abduraxmanov, v.s.xamidov 4 – ma’ruza fizika kafedrasi 2018 fizika i 1 2 ma'ruza rejasi qattiq jism aylanma harakati. kuch momenti. impuls momenti. impuls momentining saqlanish qonuni. qattiq jism aylanma harakat dinamikasi. qattiq jism aylanma harakati dinamikasining asosiy tenglamasi. inersiya momentini hisoblash. shteyner teoremasi. 3 qattiq jism aylanma harakati. kuch momenti qattiq jism aylanma harakat dinamikasining asosiy kattaliklari – kuch momenti va impuls momenti tushunchalari bir – biri bilan chambarchas bog‘liqdir. kuch momenti nuqtaga nisbatan bo‘lsa, impuls momenti o‘qqa nisbatandir. kuch momenti aylanish markaziga nisbatan bo‘lgani uchun vektor kattalikdir. impuls momenti o‘qqa nisbatan bo‘lgani uchun vektor kattalik bo‘lmaydi. 00 aylanish o‘qiga o‘rnatilga...

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