Fizika 7-sinf
201____-201____
1- NAZORAT ISHI
Mavzu: Kinematika asoslari
Nazorat shakli: Yozma ish
I variant
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«Nexiya» yengil avtomashinasi Qarshidan Buxorogacha bo‘lgan 150 km yo‘lni 65 minutda bosib o‘tdi. Avtomobilning o‘rtacha tezligini toping;
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«Tiko» avtomobili o‘rnidan qo‘zg‘alib 12 sekund ichida o‘z tezligini 100 km/ soatga yetkazdi. Uning tezlanishi nimaga teng?
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O‘quvchining uyidan maktabgacha bo‘lgan masofa 500 m ga teng. O‘quvchi 2,5 km/soat tezlik bilan yursa, maktabda necha minutda yetib boradi?
II variant
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Jism dastlabki 5 sekundda 60 metr, keyingi 20 sekundda 100 metr va oxirgi 10 sekundda 50 metr masofani bosib o‘tgan. Yo‘lning har bir qismidagi va butun qismidagi o‘rtacha tezliklarini toping;
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Jism tekis tezlanuvchan harakat qilib 5 sekund ichida o‘z tezligini 0,2 m/s dan 0,5 m/s gacha oshirdi. Jism qanday tezlanish bilan harakatlangan?
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Samolyot qo‘nish paytida g‘ildiraklari yerga tekkandagi tezligi 360 km/soat. Agar uning tezlanishi –2,0 m/s2 bo‘lsa, u qancha vaqtdan keyin to‘xtaydi?
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Nazorat ishining bali – bahosi:
2- NAZORAT ISHI
Mavzu: Kinematika asoslari
Nazorat shakli: Test sinovi
1. Mexanik harakat deb qanday harakatga aytiladi?
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Jismlarning harakatiga;
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Jismning boshlang‘ich va oxirgi vaziyatini tutashtiruvchi to‘g‘ri chiziqqa;
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Vaqt o‘tishi bilan jism vaziyatining boshqa jismlarga nisbatan o‘zgarishiga;
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Jismning harakatiga qaysi jismga nisbatan qaralayotgan bo‘lsa.
2. Agar har qanday jism istalgan bir xil vaqt oraliqlarida bir xil yo‘lni
bosib o‘tsa, u holda uning harakati deyiladi.
a) ………….notekis harakat; b) ………….tekis harakat;
c) ………….aylana harakat; d) ………….ilgarilanma harakat.
3. Uzunligi 9 m bo‘lgan ingichka ip boshidan jo‘nagan chumoli ip oxiriga
kelguncha 5 minut o‘tdi. Chumolining tezligini toping (sm/s) .
a) 1,8; b) 3; c) 2,9; d) 3,5.
4. 15 m/s tezlik necha km/soat bo‘ladi?
a) 18; b) 30; c) 54; d) 75.
5. Rasmda jism tezligining vaqtga bog‘liqlik grafigi
keltirilgan. Tezlanishni toping.
a) 15; b) 30;
c) 7,5; d) 8.
6. Avtomobil A bekatdan В bekatgacha 40 km/soat, qaytishda esa 30 m/soat teziik bilan harakatlandi. Reys davomida o‘rtacha tezlikni toping (km/soat) .
a) 34,3; b) 34; c) 33,5; d) 35.
7. Jismning havosiz joyda faqat yerning ta'siridagi harakati……….deb aytiladi.
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………………notekis harakatda tezlanish;
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………………tekis tezlanuvchan harakatda tezlanish;
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………………erkin tushish;
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………………tekis o‘zgaruvchan harakatda tezlanish.
8.20 m/s tezlik bilan ketayotgan avtomobil tormozlanish natijasida 4 s da to‘xtadi. Avtomobil tezlanishining modulini toping (m/s2) .
a) 4; b) 5; c) 10; d) 20.
9. Agar raketa 50 m/s2 tezlanish bilan harakat boshlagan bo‘lsa, 2 s dan so‘ng uning tezligi qanday bo‘ladi (m/s) ?
a) 12,5; b) 25; c) 50; d) 100.
10. Avtomobil tekis sekinlanuvchan harakat qilib tepalikka chiqmoqda.Uning o‘rtacha tezligi 10 m/s, oxirgi tezligi 2 m/s bo‘lsa, boshlang‘ich tezligi qanday (m/s) bo‘lgan?
a) 18; b) 20; c) 15; d) 10.
11. Moddiy nuqtaning aylana bo‘ylab kattaligi o‘zgarmas tezlik bilan harakatini qanday harakat deb hisoblash kerak?
a) tekis sekinlanuvchan; b) notekis tezlanuvchan;
c) tekis tezlanuvchan; d) υ=const bo‘lgan harakat.
12. 20 m/s ga teng boshlang‘ich tezlik bilan erkin tushayotgan jismning harakat boshlangandan 5s o‘tgan paytdagi tezligi qanday (m/s) bo‘ladi?
g=10 m/s2
a) 4; b) 20; c) 50; d) 70.
13. Erkin tushish boshlanganidan 4 s o‘tgan paytda jism tezligi necha
m/s bo‘ladi?
a) 40; b) 30; c) 20; d) 10.
14. Radiusi 0,25 m bo‘lgan g‘ildirak 12 m/s tezlik bilan g‘ildiramoqda. G‘ildirakning burchak tezligi qanday (rad/s) .
a) 12; b) 24; c) 36; d) 48.
15. Vagonning relsga nisbatan tezligi 72 km/soat bo‘lsa, uning diametri 40 sm bo‘lgan g‘ildiragining burchak tezligi necha rad/s dа teng?
a) 40; b) 50; c) 72; d) 144.
Test raqami
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Nazorat ishining bali – bahosi:
3- NAZORAT ISHI
Mavzu: Dinamika asoslari
Nazorat shakli: Yozma ish
I variant
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Avtomobil g‘ildiragi 0,5 minutda 60 marta tekis aylandi. G‘ildirakning aylanish davri va chastotasini toping;
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0.2 sekund davomida g‘ildirak 2 rad ga burildi. Uning o‘qidan 6 sm uzoqlikdagi nuqtasining chiziqli tezligini toping;
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Aylana bo‘ylab tekis harakat qilayotgan jismning aylanish davri 0,125 s, radiusi 1,5 m dа teng. Jismning markazga intilma tezlanishi nimaga teng?
II variant
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Uzunligi 1 metr ipga bog‘langan sharcha 1 minutda 60 marta aylandi. Sharchaning aylanish chastotasi, davri hamda chiziqli tezligini toping;
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Shkiv 50 rad/s burchakli tezlik bilan aylanmoqda. Aylanish o‘qidan 60 mm masofadagi nuqtaning tezligini toping;
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Yo‘lning radiusi 100 m bo‘lgan burilish joyida avtomobil 54 km/soat tezlik bilan harakatlanadi. Avtomobilning markazga intilma tezlanishini toping.
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4- NAZORAT ISHI
Mavzu: Dinamika asoslari
Nazorat shakli: Test sinovi
1. Kuch birligini ko‘rsating.
a) kgm/s; b) N; c) kgm2/s; d) Pa.
2. Jismga qo‘yilgan kuch 2 marta, jism massasi esa 4 marta oshirildi. Jismning tezlanishi qanday o‘zgaradi?
a) 2 marta ortadi; b) 2 marta kamayadi;
c) 4 marta ortadi; d) 4 marta kamayadi.
3. Nyutonning uchinchi qonuni qaysi ta’rifda to‘g‘ri ko‘rsatilgan?
a) Ta’sir aks ta’sirni vujudga keltiradi, ular son qiymat jihatidan o‘zaro teng;
b) O‘zaro ta'sirlashuvchi ikki jism bir-biriga miqdor jihatidan teng va to‘g‘ri
chiziq bo‘yicha qarama-qarshi tomonlarga yo‘nalgan kuchlar bilan ta'sir qiladi.
c) O‘zaro ta'sirlashayotgan ikki jismning ta'sir kuchlari o‘zaro teng bo‘lib, qarama-qarshi tomonlarga yo‘nalgan.
d) Ta'sir, aks ta'sirga teng bo‘lib, qarama-qarshi yo‘naladi.
4. Aylana bo‘ylab tekis harakat qilayotgan jismni aylanish radiusi 2 marta orttirilsa,
markazdan qochma kuch qanday o‘zgaradi?
a) 2 marta ortadi; b) 2 marta kamayadi;
c) 4 marta ortadi; d) 4 marta kamayadi.
5. Bir-biriga qarama-qarshi harakatlanayotgan jismlarning massalari teng bo‘lib, tezliklari 5 m/s va 10 m/s ga teng. To‘qnashgandan so‘ng ularning harakati qanday bo‘ladi?
a) 5 m/s, 1 jism yo‘nalishida; b) 2,5 m/s, 2- jism yo‘nalishida;
c) 2 m/s, 1 jism yo‘nalishida; d) to‘xtab qoladi.
6. Massasi 2 kg bo‘lgan jism, 3 rad/s tezlik bilan aylanmoqda. Bunda markazdan qochma kuch 18 N ga teng bo‘lsa, aylanish radiusi nimaga teng (m) ?
a) 1; b) 2; c) 3; d) 4.
7. Jismga 10 N kuch ta'sir etganda 5 s dan so‘ng 10 m/s tezlikka erishdi.Jismning massasi nimaga teng (kg) ?
a) 1; b) 3; c) 5; d) 7.
8. Jismning tezligi va aylanish radiusi 2 marta kamaytirilsa, markazdan qochma kuch qanday o‘zgaradi?
a) 2 marta ortadi; b) 2 marta kamayadi;
c) 4 marta ortadi; d) 4 marta kamayadi.
9. Yo‘lning qayrilish joyiga kelganda mashina tezligini qanday o‘zgar-
tirish kerak?
Javob:_______________________________________________________________
10. Mexanik kuch ta'rifini yozib ko‘rsating.
Javob: _______________________________________________________________
Test raqami
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Nazorat ishining bali – bahosi:
5- NAZORAT ISHI
Mavzu: Dinamika asoslari
Nazorat shakli: Yozma ish
I variant
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Butun olam tortishish qonuniga ta'rif bering. Formulasini yozing.
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Massasi 2 t bo‘lgan avtomobil tirkagichi, avtomobilga birligi 100 kN/m bo‘lgan tros yordamida ulangan. Agar ular 0,5 m/s2 tezlanish bilan harakatlansa tros qanchaga uzayadi?
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Kosmik kema yer sathidan besh yer radiusiga teng masofaga uzoqlashsa, uning yerga tortilish kuchi qanday o‘zgaradi?
II variant
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Elastiklik kuchi qachon paydo bo‘ladi? Elastik va plastik deformatsiyaga ta’rif bering.
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Massasi 2,5 t bo‘lgan avtomobil tirkagichi avtomobilga 150 kN/m bo‘lgan tros yordamida ulangan. Agar ular 0.6 m/s2 tezlanish bilan harakatlansa tros qanchaga uzayadi?
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Kosmik kema yer sathidan to‘rt yer radiusiga teng masofaga uzoqlashsa, uning yerga tortilish kuchi qanday o‘zgaradi?
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Nazorat ishining bali – bahosi:
6- NAZORAT ISHI
Mavzu: Saqlanish qonuni
Nazorat shakli: Test sinovi
1. Jism 10 N kuch ta'sirida tekis harakat qilmoqda. Uning massasi 5 kg bo‘lsa,
ishqalanish koeffisentini toping.
a) 0,4; b) 0,5; c) 0,2; d) 0,3.
2. Jism massasi 20 kg, ishqalanish koeffitsiyenti 0,2 ga teng. Jism qanday kuch (N) ta'sirida tekis harakat qiladi?
a) 20; b) 40; c) 10; d) 4.
3. Tezligi 12 m/s bo‘lgan avtomobil tormozlanib to‘xtadi. Agar avtomobil g‘ildiraklari bilan yo‘l sirti orasidagi sirpanish ishqalanish koeffitsiyenti 0,4 ga teng bo‘lsa, qancha vaqt davomida tormozlangan?
a) 1; b) 2; c) 3; d) 4.
4. Avtomobil yo‘lning egrilik radiusi 40 m bo‘lgan qayrilish joyiga keldi. Agar g‘ildiraklarning yo‘lga sirpanish ishqalanish koeffitsiyenti 0,25 ga teng bo‘lsa tezligini necha km/soat ga tushirib o‘tish kerak?
a) 20; b) 36; c) 72; d) 54.
5. Massasi 20 t bo‘lgan vagon 0,3 m/s tezlik bilan harakatlanib, massasi
30 t va tezligi 0,2 m/s bo‘lgan vagonni quvib yetadi va urilgandan so‘ng,
harakatini birga davom etdiradi. Keyingi tezlik nimaga teng bo‘ladi?
a) 0,24 m/s; b) 0,48 m/s; c) 0,22 m/s; d) 0,18 m/s.
6. 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.
7. Nima uchun futbolchilarning oyoq kiyimlari (butsilari) ning tagcharmiga «tishlar» qilinadi?
Javob_____________________________________________________________________
8. Nima uchun tirik baliqni qo‘lda ushlab turish qiyin?
Javob_____________________________________________________________________
9. Impulsning saqlanish qonunini yozing.
Javob_____________________________________________________________________
10. Jism impulsi qanday kattalik (vektormi yoki skalyar)? Javobingizni asoslab yozing.
Javob_____________________________________________________________________
Test raqami
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Nazorat ishining bali – bahosi:
7- NAZORAT ISHI
Mavzu: Saqlanish qonuni
Nazorat shakli: Yozma ish
I variant
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Dinamometr 40 N gacha bo‘lgan kuchni o‘lchay oladi. Unda birligi 500 N/m bo‘lgan prujina o‘rnatilgan. Shkalaning o‘rtasidan oxirigacha prujinani cho‘zish uchun bajarilgan ishni hisoblang.
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Massasi 2 kg bo‘lgan jismga 2 s davomida 2 N kuch ta’sir qildi. Kuch impulsi va jism impulsining o‘zgarishini toping.
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Bolalar prujinali to‘pponchasining prujinasini 5 sm ga siqish oxirida 20 N kuch qo‘yilgan. Siqilgan prujinaning potensial energiyasini toping.
II variant
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Ot aravani 400 N kuch bilan 0,8 m/s tezlik bilan tekis tortmoqda. Bunda 1 soatda qancha ish bajariladi?
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7 m/s tezlik bilan chopib ketayotgan 70 kg massali sportchi, 2 m/s tezlik bilan harakatlanayotgan 30 kg massali aravachani quvib yetib, uning ustiga chiqib oldi. Bundan keyin aravacha qanday tezlik bilan harakat qiladi?
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18 km/soat tezlik bilan harakatlanayotgan jismning kinetik energiyasi 500 J ga teng bo‘lsa, uning massasini toping.
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Nazorat ishining bali – bahosi:
8- NAZORAT ISHI
Mavzu: Saqlanish qonuni
Nazorat shakli: Test sinovi
1.«Jismning tezligi tufayli еgа bo‘lgan energiyasi…………deyiladi». Nuqtalar o‘rniga to‘g‘ri javobni topib qo‘ying.
a) ………………potensial energiya...;
b) ………………kinetik energiya...;
c) ………………to‘la energiya....;
d) ………………quvvat... .
2.Jismning vaziyati tufayli еgа bo‘lgan energiyasi…………deyiladi».
Nuqtalar o‘rniga to‘g‘ri javobni topib qo‘ying.
a) ………………potensial energiya...;
b) ………………kinetik energiya...;
c) ………………to‘la energiya...;
d) ………………quvvat....
3.6 kW soat energiya necha joulga teng?
a) 3,6 ·106 J; b) 3,6·107 J;
c) 2,16·107J; d) 2,16·106J.
4.«Vaqt birligi ichida bajarilgan ishga………………deyiladi. Nuqtalar o‘rniga to‘g‘ri javobni topib qo‘ying.
a) ………………potensial energiya...;
b) ………………kinetik energiya...;
c) ………………to‘la energiya...;
d) ………………quvvat...
5.Massasi 2 t bo‘lgan avtomobil o‘z tezligini v km/soat dan 90 km/soat ga
o‘zgartirishi uchun 525 KJ ish bajardi. v necha km/soatga teng?
a) 10; b) 20; c) 36; d) 54.
6. 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.
7. Avtomobil qiya tekislikka ko‘tarilmoqda. Avtomobil dvigatelining
quvvati 100 kW Tortish kuchi (kN) qanday bo‘lganda u tepalikka 36 km/soat tezlik bilan chiqa oladi?
a) 10; b) 15; c) 20; d ) 25.
8. Daryo suvining quvvati qayerda katta bo‘ladi ?
a) boshlanishida; b) o‘rtasida;
c) quyi o‘zanida d) daryo suvining quvvati hamma joyda bir xil bo‘ladi.
9.Kinetik energiyaning saqlanish qonuni mavjudmi? Javobingizni asoslab yozing.
Javob_____________________________________________________________________
10.Potensial energiyaning saqlanish qonuni mavjudmi? Javobingizni asoslab yozing.
Javob_____________________________________________________________________
Test raqami
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Nazorat ishining bali – bahosi:
Do'stlaringiz bilan baham: |