6 – 9, 10 fizika fanidan nazorat shakllari va ularni baholash mezonlari

5. Massasi 2 kg bo’lgan jism 4 m/s o’zgarmas tezlik bilan harakatlanmoqda. Uning kinetik energiyasi nimaga teng ?
A) 1,6 J B) 32 J C) 8 J D) 16 J
6. Massasi 0,4 kg bo’lgan jism qanday balandlikdan pastga tomon qo’yib yuborilsa, uning to’liq mexanik energiyasi 100 J ga teng bo’ladi ( g=10 m/s² ) ?
A) 100 m B) 10 m C) 50 m D) 25 m
7. Deformatsiyalangan prujinaning potensial energiyasi qaysi formuladan topiladi ?
I. E=mgh II. E=mv²/2 III. E=kx²/2 IV. E=E_k+Ep
A) III. B) I, III . C) II, IV. D) I.
8. 10 MW necha W ga teng ?
A) 10⁶ B) 10⁷ C) 10⁵ D) 10^-7
9. O’zgarmas tezlik bilan harakatlanayotgan avtomobilning quvvatini hisoblash formulasini belgilang .
A) N=A/t B) N=Fv C) N=At D) N=F/v
10. 0,1 kW∙soat necha Jga teng ?
A)10³ B) 3,6 ∙10⁶ C)3,6 ∙10⁵D) 36∙10⁶
11. Mashinaning foydali ish koyeffitsienti formulasi to’g’ri yozilgan javobni belgilang.
A) η= A_t - A_f B) η= A_f /A_t C) η= A_t /A_f D) η= A_t +A_f
12. Agar bola 10 minutda 1800 J ish bajarsa, uning foydali quvvati nimaga teng ?
A) 30 W B) 180 W C) 3 W D) 18 kW
13. Jismga ta’sir etuvchi kuch va jism ko’shishi orasidagi burchak necha gradus bo’lganda mexanik ish bajarilmaydi ?
A) 90 ̊ dan katta B) 90 ̊ dan kichik C) 180 ̊ D) 90 ̊
14. Gapni to’ldiring: “ 1 J – bu, 1 N kuch ta’sirida jismni .... masofaga ko’chirishda bajarilgan ishga teng. “
A) ...1 m .... B) ... ixtiyoriy... C) .... 1 km .... D) .... 1 sm ...
15. Ot aravani 1 km masofaga tortib borishda 220 kJ ish bajarildi. Ot aravani qanday kuch bilan tortgan ?
A) 22 N B) 220 kN C) 220 N D) 110 N
16. Jism yuqoridan pastga tushayotganda bajarilgan ish musbatmi, manfiy ? _________