1-mavzu. (Test)

22-mavzu.(Test)

1. Uzunligi 0,2 m yo‘lda qanday kuch 10 J ish bajaradi (N)?

A) 500 B) 480 C) 200 D) 50

2. Kuch bajargan ish qachon musbat va qachon manfiy bo‘ladi? Kuch va ko‘chish orasidagi burchak ...

A) o‘tkir bo‘lsa - musbat, o‘tmas bo‘lsa nol bo‘ladi

B) o‘tkir bo‘lsa - manfiy, o‘tmas bo‘lsa musbat bo‘ladi

C) o‘tkir bo‘lsa ham manfiy, o‘tmas bo‘lsa ham manfiy bo‘ladi

D) o‘tkir bo‘lsa - musbat, o‘tmas bo‘lsa - manfiy bo‘ladi

3. Kuch grafigida shtrixlab ko‘rsatilgan yuza son jihatdan qanday fizik kattalikka teng bo‘ladi?

A) bikrlik B) mexanik ish C) quvvat D) massa

4. Aravachani o‘zgarmas 10 N kuch ta’sirida 5 m masofaga siljitishdagi ishni toping (J). Kuch va ko‘chish vektorlari orasidagi burchak 60°.

A) 5 B) 10 C) 15 D) 25

5. 4 kg massali jism 60 N kuch ta’sirida 5 m balandlikka ko‘tarildi. Kuchning bajargan ishi nimaga teng bo‘ladi (J)?

A) 300 B) 200 C) 120 D) 30

6. Jismni o‘zgarmas 20 N kuch ta’sirida 5 m masofaga siljitishda bajarilgan ish 50 J ga teng. Kuch va ko‘chish vektorlari orasidagi burchakni toping.

A) 0° B) 30° C) 45° D) 60°

7. 3 kg massali jismni 6 m balandlikka tekis ko‘tarish uchun 70 N kuch sarflagan bola qancha ish bajarishini toping (J).

A) 6 B) 60 C) 420 D) 140

8. Bikrligi k bo‘lgan Prujinaning uzunligini x ga cho‘zish uchun bajariladigan ishni toping

A) kx B) -kx C) kx2 D) kx²/2

9. Bikrligi 200 N/m bo‘lgan prujina chuzilganda, 400 N elastiklik kuchi hosil bo‘ldi. Prujinani cho‘zishda bajarilgan ishni aniqlang (J).

A) 100 B) 200 C) 300 D 400

10. Agar prujinani 6 sm ga siqish uchun 4 kN kuch kerak bo‘lsa, uni 6 sm cho‘zish uchun qancha ish bajarish lozim bo‘ladi?

A) 6 J B) 12 J C) 30 J D) 120 J

11. Prujinani 1 sm ga cho‘zish uchun 1 J ish bajarilgan bo‘lsa, 4 sm ga cho‘zish uchun qancha ish bajarish kerak (J)?

A) 4 B) 8 C) 12 D) 16

12. 6 kg massali jismni tik 3 m balandlikka qanday tezlanish bilan ko‘targanda, 234 J ish bajariladi (m/s2)?

A) 3 B) 2 C) 6 D) 11

13. 3 kg massali jismni 2 m/s2 tezlanish bilan 3 m ga tik ko‘tarish uchun qancha ish bajarish kerak bo‘ladi (J)?

A) 108 B) 18 C) 180 D) 27

14. Ishchi arqonga 250 N kuch bilan ta’sir etib, ko‘char blok yordamida 20 m balandlikka yukni ko‘tardi. Bajarilgan ishni toping (kJ).

A) 10 B) 4 C) 5 D) 6