1-mavzu. (Test)

8-mavzu.(Test)

1.Aylana bo‘ylab tekis harakatlanayotgan jismning aylanish chastotasi 6 marta ortsa, aylana radiusi 36 marta kamaysa, jismning markazga intilma tezlanishi qanday o‘zgaradi?

A) o‘zgarmaydi B) 6 marta ortadi C) 36 marta kamayadi D) 36 marta ortadi

2. Radiusi 1m ga teng bo‘lgan aylana bo‘ylab tekis harakatlanayotgan jismning markazga intilma tezlanishi 10 m/s2 bo‘lsa, aylanish davri qanchaga (s) teng?

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

3. Agar aylanayotgan jismning tangensial tezlanishi 6 m/s2, markazga in­tilma tezlanishi esa 8 m/s2 ga teng bo‘lsa, uning natijaviy tezlanishini toping (m/s2).

A) 14 B) 2 C) 7 D) 10

4. Yengil avtomobil egrilik radiusi 24 m bo‘lgan burilishda 12 m/s tezlikda harakatlanmoqda. Markazga intilma tezlanishni toping (m/s2).

A) 3 B) 4 C) 6 D) 6,5

5. Avtomobil 20 m/s tezlik bilan harakatlanganda g‘ildiraklarning aylanish chastotasi 8 s^-1 bo‘lsa, avtomobil g‘ildiraklarining yo‘lga tegadigan nuqtalaridagi markazga intilma tezlanishini toping (m/s2).

A) 1000 B) 900 C)R800 D) 1600

6. 2,5 rad/s burchak tezlik bilan aylanma harakat qilayotgan karuseldaga qizcha tezliganing modulini toping (m/s). Aylanish o‘qidan qizchagacha bo‘lgan masofa 2 m ga teng.

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

7. Gorizontal stol ustidagi, aylana uzunligi 10 sm bo‘lgan silindrga ingichka ip o‘ralgan bo‘lib, ipning uchiga stol chetidagi blok orqali yuk ilingan. Silindr sirpanishsiz bitta aylanganda, yuk qancha masofa pastga siljiydi (sm)?

A) 20 B) 30 C) 40 D) 50

8.Jismning aylana bo‘ylab kattaligi o‘zgarmas tezlik bilan harakatlanishini qanday harakat deb hisoblash kerak?

A) Aylana bo’ylab tekis B) tekis tezlanuvchan C)notekis tezlanuvchan D)=const bo‘lgan harakat

9.Avtomobil g‘ildiragi eng yuqori nuqtasining yerga nisbatan tezligi 36 m/s bo‘lsa, avtomobilning tezligi necha m/s ga teng?

A) 72 B) 42 C) 36 D) 18

10. Vertolyot o‘zgarmas 0,2 m/s2 tezlanish bilan vertikal pastga tusha boshladi. Agar vertolyot parragining aylanish chastotasi 60 ayl/s bo‘lsa, vertolyot 40 m pastga tushguncha, parrak necha marta aylanadi?

A) 1103 B) 2103 C) 1200 D) 510

11.Agar ventilyator 10rad/s boshlang’ich burchak tezlik , 2rad/s² burchak tezlanish sekinlanuvchan harakatlanayotgan bo’lsa parrak to’xtaguncha necha marta to’liq aylanadi?

A)5 B)6 C)7 D)8

12.Aylana bo’ylab tezlanuvchan harakatda nuqtaning nomal tezlanish 6m/s², tangensial tezlanish esa 8m/s² ga teng bo’lsa uning to’la tezlanishini toping?(m/s²)

A)6 B)8 C)10 D)5