Mexanikada saqlanish qonunlari

Question 1

3 m/s tezlik bilan yugurayotgan 60 kg massali bolaning impulsi (kg·m/s) qanday?

Accepted Answer

180

Answer

20

Answer

80

Answer

120

Question 2

Ishqalanishsiz tekislikda doimiy tezlik bilan harakat qilayotgan ikki jismning mutloq elastik to‘qnashuvdan oldingi va keyingi oniy vaziyatlari rasmda ko‘rsatilgan. $A$ – to‘qnashuv nuqtasi bo‘lsa, quyidagi mulohazalarning qaysilari to‘g‘ri?
1. To‘qnashuvgacha birinchi jismning tezligi ikkinchisinikidan katta.
2. To‘qnashuvdan keyin ikkinchi jismning tezligi birinchisinikidan katta.
3. To‘qnashuvgacha birinchi jismning tezligi ikkinchisinikidan kichik.
4. To‘qnashuvdan keyin ikkinchi jismning tezligi birinchisinikidan kichik.

Accepted Answer

1, 2

Answer

2, 3

Answer

1, 4

Answer

3, 4

Question 3

Teng massali 3 ta brusokning 3 xil holati rasmda tasvirlangan. Qaysi holatda sistemaning potensial energiyasi eng kichik?

Accepted Answer

2-holatda

Answer

hammasida teng

Answer

3-holatda

Answer

1-holatda

Question 4

$\vec{p}_1$ impulsli 1-sharcha $\vec{p}_2$ impulsli 2-sharcha bilan elastik to‘qnashdi. 1-sharcha harakatini $\vec{p}_3$ impuls bilan davom ettirgan bo‘lsa, 2-sharchaning keyingi impulsi quyidagilarning qaysi biriga teng?

Accepted Answer

$\vec{p}_1+\vec{p}_2-\vec{p}_3$

Answer

$\vec{p}_1-\vec{p}_2-\vec{p}_3$

Answer

$\vec{p}_1+\vec{p}_3-\vec{p}_2$

Answer

$\vec{p}_3+\vec{p}_2-\vec{p}_1$

Question 5

7200 m balandlikda 216 km/h doimiy tezlik bilan uchayotgan samolyotning potensial energiyasi kinetik energiyasidan necha marta katta?

Accepted Answer

40

Answer

30

Answer

20

Answer

10

Question 6

Mis va alyuminiy jismlarning hajmlari va impulslari teng. Ulardan qay birining tezligi kattaroq?

Accepted Answer

alyuminiy jismniki

Answer

mis jismniki

Answer

ikkisining tezligi teng

Answer

agar ular shar shaklida bo‘lsa mis jismniki, kub shaklida bo‘lsa alyuminiy jismniki

Mexanikada saqlanish qonunlari

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