18. Nyutonning II- qonuni formulasini yozing. _______________________
19. Nyutonning qaysi qonuni aks tasir qonuni deb ham ataladi ? _____________
20. Jismning inertlik xossasini qaysi kattalik tavsiflaydi ? _____________________
Javoblar:
№
|
|
№
|
|
№
|
|
1
|
B
|
8
|
B
|
15
|
A
|
2
|
A
|
9
|
D
|
16
|
4 °C
|
3
|
D
|
10
|
A
|
17
|
0,06 N
|
4
|
A
|
11
|
C
|
18
|
a=F/m
|
5
|
C
|
12
|
C
|
19
|
Uchinchi qonun
|
6
|
A
|
13
|
D
|
20
|
massa
|
7
|
D
|
14
|
C
|
|
|
5 – NAZORAT ISHI
Nazorat ishi mavzusi: Dinamika asoslari
Nazorat shakli: Yozma ish
I – variant
1. Massasi 2 t bolgan avtomobil tirkagich bikrligi 100 kN/m ga teng bolgan tros bilan taminlangan. Agar u shatakka olish paytida 0,5 m/s2 tezlanish bilan harakatlansa, tros qanchaga uzayadi ?
2. Bir biridan 1 km masofada turgan 10 000 t va 12 000 t massali yuk kemalari orasida qanday tortish kuchi hosil boladi ?
3. Lift malum muddat 1,2 m/s2 tezlanish bilan yuqoriga kotarilishi malum bolsa, uning kabinasidagi massasi 80 kg bolgan odamning ogirligi shu paytda qanchaga teng bo’ladi ? Erkin tushish tezlanishi g=9,8 m/s2.
Javoblar: 1) Δl=1 sm 2) F=0,008 N 3) P=880 N
II – variant
1. Massalari 400 t va 900 t bo’lgan ikki osmon jismi ( meteorit ) orasidagi masofa 3600 km bolsa, ular bir birini qanday kuch bilan tortadi ?
2. Parashyutda sakragan sportchining massasi 100 kg ga teng bolib, 4,3 m/s2 tezlanish bilan Yerga yaqinlashmoqda. Uning ogirligi nimaga teng ? Erkin tushish tezlanishi g=9,8 m/s2.
3. Jism aloqa minorasidan gorizontal yonalishda 20 m/s tezlik bilan otildi va minora asosidan 100 m masofaga borib tushdi. Jismning harakatlanish vaqtini va minora balandligini hisoblang. Erkin tushish tezlanishi g=10 m/s2.
Javoblar: 1) F=0,18·10-5 N 2) P=550 N 3) t=5 s h=125 m
III – variant٭
1. Oy va Quyosh orasidagi masofa 149,3 million km bo'lgan hol uchun ular orasidagi tortishish kuchini hisoblang. Oyning massasini 7,3·1022 kg, Quyoshning massasini 2·1030 kg deb oling.
2. Massasi 1,2 t bo’lgan avtomobil qavariqlik radiusi 40 m bo’lgan ko’prikdan 36 km/soat tezlik bilan o’tayotganda, uning og’irligi nimaga teng bo’ladi ? Erkin tushish tezlanishi
g=10 m/s2.
3. Massasi 2 t bolgan avtomobil tirkagich bikrligi 100 kN/m ga teng bolgan tros bilan taminlangan. U shatakka olish paytida joyidan qozgalib tezligini 10 s da 36 km/soat gacha oshirsa, tros qanchaga uzayadi ?
Javoblar: 1) F=4,3·1020 N 2)P=9 kN 3)Δl = 2 sm
6 – NAZORAT ISHI
Nazorat ishi mavzusi: Tabiatdagi kuchlar
Nazorat shakli: Test
I – variant
1. Gapni to’ldiring: “ Bir jism sirtida ikkinchi jism sirpanmasdan dumalasa, bunda ular orasida hosil boladigan ishqalanish .... deb ataladi.
A) ... sirpanish ishqalanishi ... B) ... dumalash ishqalanishi ...
C)... tinch holatdagi ishqalanish ... D) ....sirpanma harakat ...
2. Gravtatsiya doimiysining son qiymati nimaga teng ( N ∙m2 / kg2 ) ?
A) 6.67∙10-8 B) 9,81 C) 9.11∙10 -31 D) 6.67∙10-11
3. Qaysi javobda sirpanish ishqalanish koyeffitsientining o’lchov birligi to’g’ri keltirilgan ?
A) birligi yoq B) mm C) N/m D) N /m2
4. 1 kosmik tezlik Yer sirti uchun nimaga teng ?
A) 16,7 km/s B) 11,2 km/s C) 7,9 km/s D) 9,81 km/s
5. Birinchi marta inson qachon kosmosga uchgan ?
A) 1773-yil B) 1961-yil 12 aprel C) 2001-yil 10-may D) 1957 yil 4 oktabr
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