15-mavzuga doir mavzular

23. 72 kg/soat tezlik bilan harakatlanayotgan, massasi 60 kg bo’lgan, meteoritning kinetic energiyasini hisoblab toping (kJ)

A) 50 B) 12 C) 10 D) 200

24. Massasi 1,25 kg bo’lgan jismning kinetik energiyasi 10 J. Uning implusini toping(kg*m/s)

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

25. Implusi 30 kg*m/s, kinetic energiyasi 90J bo’lgan jismning massasini aniqlang (kg)

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

26. 20 m/s tezlik bilan uchib kelayotgan, massasi 0.5 kg bo’lgan futbol to’pini darvazabon 0.1 s ichida ushlab to’xtatdi. Darvazabonning quvvatini (W) toping/

A) 1200 B) 900 C) 600 D) 1000

27. 2kg massali jism 20 m/s tezlik bilan gorizontal otildi. 3 sequnddan keyin jismning kinetik energiyasi nimaga teng bo’ladi (J)?

A) 400 B) 1200 C) 1300 D) 2600

28. Bikrligi 100 N/m bo’lgan prujinaga 200 N kuch tasir qilmoqda. Uning patensial energiyasini toping (J)

A)2000 B) 1000 C) 200 D)100

29. 20 kg massali yuk tasirida prujina 2 sm ga cho’zildi. Prujinaning potensial energiyasini toping.

A)2 J B) 4 J C) 0.2 J D) 0.4 J

30. Uzunligi 5 sm bo’lgan pruzina 40 N kuch tasirida 1 sm ga cho’zilsa, pruzinaning patensial energiyasini toping (J).

A) 0.2 B) 0.4 C) 0.5 D) 1

31. Reaktiv samalyotga vertiqal yo’nalishdagi 550 kN og’irlik kuchi va 555 kN ko’tarish kuchi, gorizontal yo’nalishda esa 162 kN tortish kuchi va havoning 150 kN qarshilik kuchi tasir qiladi. Teng tasir etuvchi kuchini toping (kN).

A) 13 B) 15 C) 12 D) 17

32. 40 N kuch ta’sirida eshik ochildi. Eshikni aylantiruvchi moment 20 N*m ga teng bo’lsa, eshikni ochuvchi kuch yelkasi nimaga teng (m)?

A) 0.5 B) 0.6 C) 0.4 D) 0.8

33. Yerda yotgan sterjenning bir uchidan 24 N kuch bilan ko’tarish mumkin bo’lsa sterjenning massasini toping (kg).

A) 4.8 B) 1.2 C) 0.6 D) 3.63

34. Richangning to’la uzunligi 3 m. Uning bir uchiga osilgan 5 kg massali yuk ikkinchi uchiga osilgan 20 kg massali yuk bilan muvozatda turishi uchun tayanch ikkinchi yukdan qanday masofada bo’lishi kerak (m)?