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QUVVAT

QUVVAT. mexanik ish va uning birligi. Fizikada “ish” atamasi nimani bildiradi? Kuchning shu kuch ta`sirida o`tilgan S masofada ko`paytmasiga teng bo`lgan kattalik ish deb ataladi A harfi bilan belgilash qabul qilingan. A-ish – joul (J) F-kuch - nyuton ( N ) S-yo`l - metr (m ).

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QUVVAT

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  1. QUVVAT

  2. mexanik ish va uning birligi • Fizikada “ish” atamasi nimani bildiradi? • Kuchning shu kuch ta`sirida o`tilgan S masofada ko`paytmasiga teng bo`lgan kattalik ish deb ataladi A harfi bilan belgilash qabul qilingan. • A-ish – joul (J) • F-kuch - nyuton ( N ) • S-yo`l - metr (m )

  3. Agar kuch bilan jismning yo`nalish bir xil bo`lsa, yoki bir tomonga yo`nalgan bo`lsa unda kuchning bajargan ishi musbat deyiladi • Agar kuchning yo`nalish va jismning yo`nalishi bir-biriga qarama-qarshi bo`lsa unda kuchning bajargan ishi manfiy bo`ladi. • Ish vekor kattaligi bo`lib uning o`lchov birligi ingliz olimi Jeyms Preskott Joul sharafiga joul deb atalgan, shartli belgisi esa katta J harfi bilan yoziladi. 7 1J = 1N x m 1joul=1nyuton x 1 metr

  4. Test «ISH» Nimada hisoblanadi:4. ish;5. kuch6. yo`l. а) Н;    b) м;    c) Дж. Qaysi harf bilan belgilanadi:1. ish;2. kuch;3. yo`l. а) F;    b) S;   c) A. Agar og`irlik kuchi 600 Nbo`lsa, S=4m , unda bajaradigan ish nimaga teng bo`ladi?a) 240 J b) 24 J v) 2,4 kJ ish formulasi:а) p=F/S;b) F=gm;c) A=FS;d) A=SF.

  5. Kimning quvvati katta va nimaga? • A B C D

  6. - Quvvat • Ishning bajarilishi tezligini harakterlovchi fizik kattalik quvvat deyiladi. • Quvvat vaqt birligi ichida bajarilgan ish bilan o`lchanadi va “N” harfi bilan belgilanadi: • QUVVAT=ISH/VAQT N=A/t • bunda N- quvvat - Vt A- ish -J t- vaqt • Quvvat birligi qilib shunday qurilmaning quvvati qabul qilinadiki, bunda 1s ichida 1j ga teng ish bajariladi. Bu quvvat birligi ingliz olimi Jeyms Vatt sharafiga vatt (1Vt) deb ataladi. 1Vt=1J/S

  7. Amaliyot-masalalarni yechish

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