13._________________________________________________________________________________
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To’g’ri javob:_________ To’plagan ball:___________ Baho:______________
NAZORAT ISHI №7
Sana:_____________________________
Nazorat shakli: Testo‘tkazish.
1. Og‘irligi 40 N bo’lgan jismni 120 sm balandlikka ko‘tarishda bajarilgan ishni aniqlang.
A) 4,8 J B) 4 J C) 48 J D) 40 J
2. 18 km/sоаt tezlik bilаn hаrаkаtlаnаyotgаn jismning kinetik energiyasi 500 J gа teng bo`lsа, uning mаssаsini tоping.
A) 40 kg B) 1000 kg C) 20 kg D) 500 kg
3. Jism yuqoriga harakatlanmoqda qaysi energiyasi ortadi. Nuqtalar o‘rniga to‘g‘ri javobni topib qo‘ying.
A) Potensial energiya B) Kinetik energiya.
C) To‘la energiya D) Quvvat.
4. “Neksiya” avtomobili dvigatelining quvvati 76 ot kuchiga teng. Uni W larda ifodalang.
A) 76000 B) 55898 C) 100154 D) 55936
5. 54 m balandlikdan erkin tushayotgan 5,2 kg li yuk yerdan 25 m balandlikda qanday to‘la energiyaga ega bo‘ladi?
A) 2808 J B) 2600 J C) 1404 J D) 1300 J
6. Jismlarning ish bajara olish qobiliatiga nima deyiladi
A) Ish B) quvvat C) energiya D) Patensial energiya
7. 54 km/sоаt tezlik bilаn hаrаkаtlаnаyotgаn 50 kg mаssаli meteоritning kinetik energiyasini tоping.
A) 54 m B) 750 C) 5625 D) 5600 m
8.Impuls so’zining ma’nosi qanday
A) Turtki B) tortqi C) ta’sir D) TJY
9. Jism impulsi deb nimaga aytiladi?
A) Jism massasi bilan ta’sir etuvchi kuch ko`paytmasiga
B) Jism massasining tezlikka ko`paytmasiga
C) Ta’sir etuvchi kuchning vaqtga ko’paytmasiga
D) Ta’sir etuvchi kuchning massasiga nisbatiga
10. Quyidagi jismlarning qaysi biri kenetik energiyaga ega bo`ladi?
A) Yerda turgan jism
B) Yerdan ko‘tarilgan tosh
C) Kamondan o‘tganda tarang tortilgan kamon ipi
D) Dars tayyorlab o`tirgan o`quvchi.
11. Erkin tushayotgan 4 kg massali jism o‘z tezligini 2 m/s dan 8 m/s ga oshirdi. Impuls o‘zgarishini toping.
A) 16 kg·m/s B) 24 kg·m/s C) 64 kg·m/s D) 32 kg·m/s
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