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7-sinf Fizika 4-chorak

InfoMaster

Aprel 26, 2021

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7-sinf Fizika 4-chorak

Testni Vafaqulov Alisher tayyorladi.

1 / 25

Soatning sekund mili burchakli tezligini toping. (rad/s)

A) π/10

B) π/1800

C) π/2600

D) π/30

2 / 25

Agar moddiy nuqta aylana bo’ylab teng vaqtlar orasida teng yollarni bosib o’tsa, bunday harakat ....... harakat deyiladi

A) aylanma o’zgaruvchan

B) notekis

C) tekis aylanma tezlik

D) tekis

3 / 25

Soatning 30 mm uzunlikdagi minut uchi 10 minutda 31,4 mm uzunlikdagi yo’lni bosib o’tdi. Minut mili uchining burchak tezligini toping.

A) 0,0017 rad/s

B) 0,017 rad/s

C) 1,7 rad/s

D) 0,17 rad/s

4 / 25

Soatning minut mili burchakli tezligini toping

A) π/10

B) π/2600

C) π/30

D) π/1800

5 / 25

Velosiped g’ildiragining o’qidan eng uzoq nuqtasi 0,02 s davomida 20 km yo’lni bosib o’tdi. Velosipedning tezligini toping

A) 36 km/soat

B) 3,6 km/soat

C) 4 km/soat

D) 0,36 km/soat

6 / 25

Soatning vaqt mili burchakli tezligini toping. (rad/s)

A) π/10

B) π/30

C) π/1800

D) π/2600

7 / 25

Aylanma tekis harakatdagi chiziqli tezlik formulasini ko’rsating.

1) V=2¶R/T, 2) V=wR, 3)V=2¶RV

A) 3

B) 1,2,3

C) 1

D) 2

8 / 25

Burchakli ko’chishning vaqtga nisbati qanday fizik kattalik?

A) davr

B) chastota

C) tezlanish

D) burchakli tezlik

9 / 25

0,1 s davomida g’ildirak 1 chapga buriladi. Uning o’qidan 5sm uzoqlikdagi nuqtasining chiziqli tezligini toping

A) 5 m/s

B) 50m/s

C) 0,5 m/s

D) 10m/s

10 / 25

Zambarakdan gorizantga burchak ostida uchib chiqqan snaryad 12 sekund uchgan. Snaryad ko’tarilgan eng yuqori balandlik qancha

A) 360m

B) 10m

C) 180m

D) 20m

11 / 25

Ko’tarilish balandligi 4 marta ortishi uchun yuqoriga otilgan jismning boshlang’ich tezligini necha marta oshirish lozim

A) 55 martta

B) 50 martta

C) 60 martta

D) 45 martta

12 / 25

Yer uchun birinchi kosmik tezlik qiymatini ko’rsating

A) 7,9 km/s

B) 11,2 km/s

C) 16,7 km/s

D) 7,9 m/s

13 / 25

Yerning tortishish kuchi ta’sirida jismning yer atrofida aylana bo’ylab, harakatlanishida erishtiradigan tezlik ………. deyiladi

A) 1-kosmik tezlik

B) notekis tezlik

C) 3-kosmik tezlik

D) 2-kosmik tezlik

14 / 25

Oyning yer atrofida harakatlanish tezligini toping. Yer massasi 6*10 24 kg, yer bilan oy orasidagi masofa 400 000 km gravitatsion doimiylik $6,67\cdot 10^{-11}$ Nm²/kg²

A) 7,9 km/s

B) 11,2 km/s

C) 9,8 km/s

D) 1 km/s

15 / 25

Faqat butun olam tortishish kuchlari ta’sirida erkin harakat qilayotgan xar qanday jism ......... xolatida bo’ladi

A) turg’unmas muvozanat

B) vaznsizlik

C) turg’un muvozanat

D) o’ta yuklanish

16 / 25

Balkondan boshlang’ich tezliksiz tushib ketgan jism 1 s da yerga etib kelgan bo’lsa, u qanday balandlikdan (m) tushgan?

A) 15

B) 20

C) 10

D) 5

17 / 25

Erkin tushib harakat qilayotgan jismning tezligi har sekundda qanchaga o’zgaradi

A) 10 m/s

B) 5 m/s

C) 15 m/s

D) o’zgarmaydi

18 / 25

Tezlanishning o’lchov birligini ko’rsating

A) m/s

B) m/s²

C) m²/s

D) s/ m²

19 / 25

Jismning harakat tenglamasi x = 2 – 3 t + 2 t² formula bilan berilgan. Bu harakat uchun tezlik tenglamasini yozing

A) υ = 4 t

B) υ= 4 - 3 t

C) υ= - 3 + 4 t

D) υ= 4 + 3 t

20 / 25

Jism 20 m/s tezlik bilan tik yuqoriga otildi. Jism necha sekund eng baland nuqtasigacha ko’tariladi? g = 10 m/s²

A) 2 c

B) 1 c

C) 3 c

D) 4 c

21 / 25

Jism yerdan 35 m/s tezlik bilan tik yuqoriga otildi. U yerga necha sekunddan so’ng tushadi?

A) 9

B) 3

C) 5

D) 7

22 / 25

Jism tekis tezlanuvchan harakat boshlab, 3-sekundda 5 m yo’l o’tdi. U harakatning boshlang’ich 3 sekundida qanday yo’l o’tadi (m) ?

A) 11

B) 13

C) 9

D) 7

23 / 25

Nyutonning 3 qonuni formulasi qaysi ifodada to’g’ri ko’rsatilgan?

A) F1 =- F2

B) F = - k x

C) F = mg

D) F = mv²/ R

24 / 25

1000 mN necha N?

A) 1

B) 400

C) 70

D) 10

25 / 25

Massasi 4 kg bo’lgan jism biror kuch ta’siri ostida 2 m/s² tezlanish oldi. Shunday kuch ta’siri ostida massasi 10 kg bo’lgan jism qanday tezlanish oladi?

A) 0,8 m/s²

B) 2 m/s²

C) 1 m/s²

D) 0