7-sinf Fizika 3-chorak

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Testni Vafaqulov Alisher tayyorladi.

1 / 25

Joyidan qo’zg’algan jism 0,2 m/s² tezlanish bilan harakatlanganda 1 minutda u qanday tezlikka erishadi

A) 1,2 m/s

B) 12 m/s

C) 0,12 m/s

D) 120 m/s

2 / 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) 7

B) 11

C) 13

D) 9

3 / 25

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

A) υ= - 3 + 4 t

B) υ = 4 t

C) υ= 4 + 3 t

D) υ= 4 - 3 t

4 / 25

Tekis tezlanuvchan harakatda tezlik va tezlanish ishoralarning munosabatini ko’rsating.

1) υ₀ > 0, a>0

2) υ₀ > 0, a<0

3) υ₀ < 0, a<0

4) υ₀<0, a>0

A) 1,2

B) 3,4

C) 2,4

D) 1,3

5 / 25

Tezlanish formulasi qanday ifodalanadi

A) p = m / v

B) a = (v - v˳)/t

C) p = F / S

D) S = at² / 2

6 / 25

Tekis sekinlanuvchan harakatda tezlik va tezlanish ishoralarining munosabatini ko’rsating.

1) υ₀ > 0, a<0 2) υ₀ = 0, a<0 3) υ₀ < 0, a>0

4) υ >0, a>0

A) 2,3

B) 4

C) 1,3

D) 3,4

7 / 25

Tezligi υ=5-3 t (m/s) tenglama bilan berilgan jismning boshlangich tezligi (m/s) nimaga teng?

A) 2

B) 3

C) 5

D) 4

8 / 25

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

A) 15

B) 10

C) 5

D) 20

9 / 25

25 m/s tezlik bilan yuqoriga tik otilgan jismning 2 s dan keyingi tezligi qancha bo’ladi?

A) 5 m/s

B) 15 m/s

C) 10 m/s

D) 20 m/s

10 / 25

Aylanma tekis harakatga chiziqli tezlik va burchakli tezlik bog’lanish formulasini ko’rsating

A) ω=2p υ

B) υ=2pR/T

C) υ=ωR

D) ω=2p/T

11 / 25

Soatning 30 mm uzunlikdagi minut uchi 10 minutda 31,4 mm uzunlikdagi yo’lni bosib o’tdi. Minut mili uchining burilish burchagini toping. (rad)

A) 4 rad

B) 3 rad

C) 5 rad

D) 1,05 rad

12 / 25

Velosiped raridusi 25 m bo’lgan aylanma yo’lda 10 m/s tezlik bilan tekis harakatlanmoqda. Uning markazga intilma tezlanishini toping. (m/s²)

A) 5

B) 2

C) 4

D) 3

13 / 25

Aylanma tekis harakatda chiziqli tezlik bilan burchak tezlik orasidagi munosabat formulasini ko’rsating

A) w=2¶/T

B) w=2¶V

C) V=wR

D) w=4/t

14 / 25

Soatning minut mili burchakli tezligini toping

A) π/10

B) π/2600

C) π/1800

D) π/30

15 / 25

Aylanma tekis harakatdagi chiziqli tezlik formulasini ko’rsating.

1) V=2¶R/T, 2) V=wR, 3)V=2¶RV

A) 1

B) 1,2,3

C) 3

D) 2

16 / 25

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

A) 4 km/soat

B) 36 km/soat

C) 3,6 km/soat

D) 0,36 km/soat

17 / 25

Burchakli ko’chishning vaqtga nisbati qanday fizik kattalik?

A) davr

B) tezlanish

C) chastota

D) burchakli tezlik

18 / 25

Massasi 60 kg bo’lgan jism tik yuqoriga 1 m /s² tezlanish bilan ko’tarilayotgan bo’lsa, uning og’irligi qanday bo’ladi?

A) 600 N

B) 480 N

C) 540 N

D) 660 N

19 / 25

Massasi 0,5 kg bo’lgan koptokka 0,02 s davomida zarb berilgandan keyin u 10 m / s tezlik oladi. Zarbning o’rtacha kuchini toping

A) 250 N

B) 200 N

C) 1000 N

D) 500 N

20 / 25

Nyutonning 2-qonuni formulasini ko’rsating

A) a = F / m

B) a = v² /R

C) a = v/t

D) a = 2s/ t²

21 / 25

O’zaro ta’sirlashuvchi jismlarning bir-biriga ta’sir kuchlari bir to’g’ri chiziq bo’yicha yo’nalgan, moduli bo’yicha teng va yo’nalish bo’yicha qarama-qarshidir. Bu .......

A) Nyutonning 2 qonuni

B) Nyutonning 1 qonuni

C) Nyutonning butun olam tortishish kuchi qonuni

D) Nyutonning 3 qonuni

22 / 25

Gorizontal tekislikda yotgan 6 kg massali jism qanday kuch ta’sirida 1s da 2 m/s tezlikka erishadi? Jismga ta’sir etayotgan ishqalanish kuchi 4 N ga teng deb xisoblang

A) 4

B) 16

C) 12

D) 8

23 / 25

Vaznsiz ko’zg’almas blok orqali o’tkazilgan vaznsiz cho’zilmas ipga massalari 6 va 4 kg bo’lgan ikki yuk osilgan. Ishqalanish yo’q. Agar bu sistema o’ziga qo’yib berilsa, yuklar qanday tezlanish (m/s²) bilan xarakat qiladi?

A) 2

B) 3

C) 4

D) 1

24 / 25

60 N kuch jismga 0,6 m/s² tezlanish beradi. Qanday kuch bu jismga 2 m/s² tezlanish beradi?

A) 150 N

B) 200 N

C) 250 N

D) 180 N

25 / 25

Tennischi 100 kg massali koptokni 250 N kuch bilan urganda koptok 50 m/s tezlik oldi. Zarb necha sekund davom etgan?

A) 10

B) 100

C) 50

D) 20

Baholash mezoni

86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

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