10 sinf Fizika fanidan Variant- 1

10 sinf Fizika fanidan Variant- 1
1.Vertolyot gorizontal ravishda 40 km uchib, 90⁰ burchak ostida burildi va yana 30 km uchdi. Vertolyot uchgan yo‘lni va ko‘chishini toping (km).
.A) 70;50 B) 50;70 C) 7;50 D) 70;5
2 .Rasmda ko’rsatilgandek jism aylana bo'ylab soat strelkasi bo’ylab harakatkabnoqda. Bunday harakatda markazga intilma tezlanish qaysi tomonga yo’nalgan?
A) 1 B) 2 . C)3 D)4

3.Aylana bo‘ylab tekis harakat qilayotgan jism radiusi 2 marta oshirilsa, markazdan qochma kuch qanday o‘zgaradi?A) 2 marta ortadi .B) 2 marta kamayadi C) 4 marta ortadi D) 4 marta kamayadi
4.Jism 60с^-1 burchak tezlik bilan aylanayotib erkin tushadi. Tushish balandligi 1,25m. Jism tushish davomida necha marta aylanadi? A) 10 B) 20 C) 30 D) 40
5.Velosipedchi radiusi 10m bo`lgan aylana bo`ylab burilmoqda. Agar uning tezligi 7m/s bo`lsa, gorizontga nisbatan qanday burchak ostida ogмb harakatkanishi kerak? A) 30⁰ B) 45⁰ C) 60⁰ D) 90
6.Massasi 5 kg bo’lgan jism vertical pastga 14,7 m/s tezlanish bilan tushmoqda. Unga og’irlik kuchidan tashqari yana qancha kuch ta’sir etmoqda? A) 24,5 N B) 147 N C) 50 N D) 0 N
7. Konkichi stadionda yarimaylana 75m radiusda yugurib chiqdi.Uning bosib o`tgan yo`li va ko`chishni aniqlang.А. 235 m; 75m В. 471 m.; 150 m C. 235 m.; 150 m D. 150мm; 471m
8 . Ikkita aylanuvchi val ularga nisbatan sirpanmaydigan tasma bilan ulangan. Birinchi val radiusi R, ikkinchi val radiusi 2R. Birinchi valning burchak tezligi bo‘lsa, ikkinchi valning A nuqtadagi burchak tezligini toping.
.A)  B)  C)  D) 
9. G`ildirak 100p rad/s burchak tezlik bilan aylanmoqda. 20 s davomida u necha marta aylanadi?

1. 
   6 283 B) 2000 C) 1200 D) 1000
   

10.Jism 5 m radiusli aylana bo`ylab 20 π m/s tezlik bilan harakatlansa uni aylanish chastotasi qanday?
A) 2 B) 2π C) 2π² D) 0,5
11.Radiusi 20 sm bo`lgan g`ildirakning o`qi 3 m/s chiziqli tezlik bilan harakatlanadi. G`ildirakning burchak tezligini toping. (1/rad)A) 1,5 B) 0,15 C) 15 D) 6
12. Avtomobil egrilik radiusi 60 m bo’lgan ko’prikdan qanday tezlik bilan o’tganida vaznsiz bo’lib qoladi (km/soat)? A) 87 B) 78 C) 100 D) 72
13.Aylana bo’ylab teks harakat qilayotgan jismning aylanish chastotasi 7 marta ortsa ,aylanish radiusi 49 marta kamaysa markazga intilma tezlanishi qanday o’zgaradi?
A)7 marta ortadi B)7 marta kamayadi C)O’zgarmaydi D)49 marta ortadi.
14. Burilish burchagi qanday birlik bilan o’lchanadi ?
A) Radian (rad) B) Metr (m) C) Sekund (sek) D) Millimetr (mm)
15.Vazinsizlik holatida qanday soatdan foydalansa bo’ladi
A) prujinali soat B) mayatnikli soat C) qum soat D) barcha soat ishlanmaydi
16. .Elektr dvigatelining aylanish chastotasi 1200 ayl/min bo`lsa uning aylanish davri (C)qanday?
A)20. B) 0,05. C) 1200. D) 83,33
17. O’zaro ta’sir tufayli 2ta sharchadan biri 4sm/s ikkinchisi 60sm/s tezlanish oldi qaysi biring massasi necha marta katta?
A) 1-siniki 15marta ko’p B) 2-siniki massasi 15 marta ko’p
C) 2-siniki 15 marta oz D) 2-siniki massasi 5 marta ko’p
18. Zambarakdan o`q 600 m/s tezlik bilan uchib chiqdi. Agar porux gazi 2700 kN bosim kuchi hosil qilib snaryad zambarak ichida 2 ms harakatlangan bo`lsa o`qning massasini aniqlang.____________________
19.Massasi 500t bo’lgan poyezd o’rnidan siljib, 25 sequndda 18km/soat tezlikga erishdi. Poyezdni dvigatelini tortishish kuchini toping___________________
20. Massasi 2160 kg bo`lgan avtomobil 30 s davomida 500 m yo`l o`tgan bo`lsa unga ta’sir etgan kuch moduli nimaga teng? ___________________________
21.Yuk ortilgan ikki vagonning har birining massasi 70 t dan, ular orasidagi masofa 200 m. Vagonlar o`zaro qanday kuch bilan tortishadi? __________________
22.Berilganlardan butun olam tortishish qonunini ifodalovchi formulani toping.__________________________
23. Sayyora atrofida aylana orbitalar bo’yicha ikki yo'ldosh aylanmoqda.
1-yo’ldoshning orbita radiusi 2-yo’ldoshnikidan 4 marta katta. l-yo’ldoshning aylanish davri 16 soat. 2-yo'ldoshniki qanday? (soat)______________________
24. Yer sirtidan uning radiusiga teng balandlikda erkin tushib tezlanishi nimaga teng? _______________________
25. Ikki jismdan har birining massasi 2 marta oshirilsa va ular orasidagi masofa 2 marta kamaytirilsa, ularning o`zaro tortishish kuchi qanday o`zgaradi?_______________________