1-mavzu. (Test)

7-mavzu.(Test)

1. Bir minutda 120 marta aylanayotgan ventilator parragining aylanish davrini toping (s).

A) 5 B) 0,5 C) 0,05 D) 20

2. Yengil avtomobilning tezligi 20 m/s, g‘ildiragining diametri 64 sm. G‘ildirakning burchak tezligini toping (rad/s).

A) 62 B) 62,5 C) 64,5 D) 15,5

3. Avtomobildagi tezlik o‘lchovchi asbob shkalasining uzunligi 20 sm ga teng. U avtomobil tezligini 0 dan 180 km/soat oraliqda o‘lchaydi. Agar avtomobil 5m/s2 tezlanish bilan harakatlanayotgan bo‘lsa, asbob ko‘rsatkichining tezligini hisoblang (m/s).

A) 0,01 B) 0,02 C) 0,05 D) 1

4.Turbogenerator 1500 ayl/min chastotaga ega. Uning burchak tezligini toping (rad/s). =3 deb hisoblang.

A) 300 B) 900 C) 600 D) 150

5. Istagan vaqt momentida jismning tezlik va tezlanish vektori to‘g‘ri burchak hosil kilsa, u qanday harakatda bo‘ladi?

A) tinch turadi B) To‘g‘ri chiziqli tekis harakatda

C) to‘g‘ri chiziqli notekis harakatda D)aylana bo‘ylab tekis harakatda

6. Vertolyot o‘zgarmas 0,2 m/s2 tezlanish bilan vertikal pastga tusha boshladi. Agar vertolyot parragining aylanish chastotasi 50 ayl/s bo‘lsa, vertolyot 40 m pastga tushguncha, parrak necha marta aylanadi?

A) 1 103 B) 2103 C) 400 D) 1000

7. G‘ildirak 0,5 minutda 120 marta aylandi. Aylanish chastotasini (Gs)toping.

A) 2 B) 3 C) 1,5 D) 4

8. Velosiped haydovchi 10 m/s o‘zgarmas tezlik bilan harakatlanmokda. Uning g‘ildiragi diametri 160 sm. G‘ildirakning pastki nuqtasi Yerga nis­batan qanday tezlanish bilan harakatlanadi (m/s2)?

A) 0 B) 1,25 C) 2,5 D) 125

9. Berilgan  gradus janubiy kenglikdagi Yer sirti nuqtalarining chiziqli tezligini aniqlang. Yer radiusi R , Yerning sutkalik aylanish davri T.

A) B) C) D)

10. Jism 40 m/s tezlik bilan 5 m radiusli aylana bo‘ylab harakatlanmoqda. Jismning aylanish siklik chastotasi nimaga teng?

A) 8 B) 471 C) 2² D) 0,5

11. Yuk avtomobili g‘ildiragining diametri 1 m bo‘lib, u 1 minutda 200 marta aylanadi. Avtomobil tezligini toping (m/s).

A) 10,5 B) 12 C) 20 D) 15,5

12. 4 mm diametrli parmaning chetki nuqtasining markazga intilma tezlanishi 1568 m/s2. Parma minutiga necha marta aylanishini aniqlang.

A) 6031 B) 7023 C) 8408 D) TJY

13. Kichik sharcha aylana bo‘ylab tekis harakat qilmokda. Agar aylana ra­diusi o‘zgarmasdan, uning tezligi 3 marta kamaysa, markazga intilma tezla­nish qanday o‘zgaradi?

A) 3 marta kamayadi B) 3 marta ortadi C) 9 marta kamayadi D)o‘zgarmaydi

14. Kichik sharcha aylana bo‘ylab tekis harakat qilmoqda. Agar harakat tezligi o‘zgarmasdan, aylana radiusi 9 marta ortsa, markazga intilma tezla­nish qanday o‘zgarishini toping.

A) 3 marta ortadi B) 3 marta kamayadi C) 9 marta ortadi D)9 marta kamayadi

15. Egrilik radiusi 100 m bo‘lgan yo‘l kismida 72 km/soat tezlik bilan harakatlanayotgan poezdning markazga intilma tezlanishini toping (m/s2)?

A) 4 B) 2,5 C) 2 D) 5