Nazorat shakli: Fizik diktant I – variant 1


m/s2 necha 1 sm/s2 ga teng ? _____________________ 20


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19. 1 m/s2 necha 1 sm/s2 ga teng ? _____________________
20. Boshlang’ich tezligi v0 bo’lgan tekis tezlanuvchan harakat qilayotgan jismning bosib o’tgan yo’lini hisoblash formulasini yozing . _____________________


Javoblar:
















1

B

8

A

15

D

2

A

9

B

16

Oniy tezligi

3

C

10

C

17

a=v-v0/t

4

C

11

C

18

Yo'l grafigi

5

D

12

A

19

100

6

D

13

B

20

S=v0t + at2/2

7

B

14

A









3 – NAZORAT ISHI
Nazorat ishi mavzusi: Aylanma tekis harakat
Nazorat shakli: Yozma ish
I – variant
1. Diametri 50 sm bo’gan avtomobil g’ildiragi 0,5 minut davomida 60 marta tekis aylandi. G’ildirakning aylanishlar davri va chastotasini, chetki nuqtalarining chiziqli va burchak tezligini toping.
2. Poyezd egrilik radiusi 800 m bo’lgan burilishda 72 km/soat tezlik bilan harakatlanayotganda uning markazga intilma tezlanishi qanday bo’ladi ?
3. Karusel plarformasining aylanish davri 40 s ga teng. Aylanish o’qidan 4 m uzoqlikdagi nuqtalarning chisiqli tezligi va markazga intilma tezlanishi nimaga teng.
Javoblar: 1) T=0,5 s ν=2 Hz v=314 m/s ω=12,56 rad/s 2) a=0,5 m/s2
3) v=0,628 m/s a=0,098 m/s2
II – variant
1. Yuk avtomobili 90 km/soat tezlik bilan harakatlanganda uning g’idiraklari 10 Hz bilan chastota bilan aylanadi. G’ildiraklar radiusini, ularning aylanishlar davrini, chetki nuqtalarning burchak tezligini hisoblang.
2. Yukni 0,4 m/s tezlik bilan ko’tarishda diametri 16 sm bo’lgan chig’riq barabanining aylanish chastotasi qanday bo’ladi ?
3. Avtomobil qavariq ko’prik ustdan 72 km/soat tezlik bilan o’tganda, markazga intilma tezlanishi 10 m/s2 teng bo’ladi. Ko’prikning qavariqlik radiusi nimaga teng ?
Javoblar: 1) T=0,1 s R=0,4 m ω=25 rad/s 2) ν=0,79 Hz 3) R=40 m

III – variant ⃰
1. Kombayn yanchish barabanining diametri 600 mm ga, aylanish davri 0,5 s ga teng. Barabanning aylanish chastotasini, aylanish o’qidan eng uzoqdagi nuqtalarning chiziqli va burchak tezliklari , hamda markazga intilma tezlanishini hisoblang .
2. Samolyotning uchish tezligi 360 km/soat bo’lganda uning havo parragi 1 minutda 1500 marta aylanadi. Parraklar uzunligi qanchaga teng ?
3. Aylana bo’ylab tekis harakatlanayotgan jismning aylanish davri 0,125 s, aylana radiusi 1,5 m ga teng. Jismning markazga intilma tezlanishini hisoblang
Javoblar:1) ν=2 Hz v=3,77 m/s a=47,3 m/s2 ω=12,56 rad/s 2) R=63 sm 3) a=3786 m/s2


4 – NAZORAT ISHI
Nazorat ishi mavzusi: Dinamika asoslari
Nazorat shakli: Test
I – variant
1. Jismga ta’sir qiluvchi kuch 4 marta kamaysa, uning oladigan tezlanishi qanday o’zgaradi ?
A) 4 marta kamayadi B) 2 marta ortadi C) 4 marta ortadi D) 16 marta kamayadi
2. Qaysi javobda massa o’lchov birliklarining kamayib borish ketma – ketligi to’g’ri yozilgan ?
A) t, kg, g, mg B) mg, g, kg, t C) t, kg, mg, g D) mg, t, kg, g

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