Ishqalanish. Ishqalanish kuchi. Tabiatda va texnikada ishqalanish

Potensial energiya. Potensial energiyani hisoblash 
1. Potensial energiya nimani tavsiflaydi? 
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2. Potensial energiya XBS da qanday birliklarda o‘lchanadi? Nima uchun? 
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3. Jismning (jismlar tizimining) potensial energiyasini qanday o‘zgartirish 
mumkin? 
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4. Gapni qanday tushunish mumkin: “Siqilgan prujinaning potensial energiyasi 
E
p
=2 J”? 
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5. To‘p qaysi ko‘rinishdagi energiyalarga ega:
a) Yerning gorizontal sirti bo‘ylab harakatlanganda;
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b) daraxt shohlari orasiga tiqilib qolganda;
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c) voleybol to‘ri ustidan uchib o‘tganda? 
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5. Yerning tortishish maydonida joylashgan jismning va deformatsiyalangan 
jismning potentsial energiyasining qiymati nimaga bog‘liq? 
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6. Jismning potentsial energiyasi bir vaqtning o‘zida nolga teng va noldan farqli 
bo‘lishi mumkinmi? 
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7. Yerda va Oyda bir xil balandlikka ko‘tarilgan jismning potentsial 
energiyalari tengmi? 
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8. Rasmda ko‘rsatilgan chiroqning kursiga nisbatan 
potentsial energiyasi qancha? Stol yuzasiga nisbatanchi? 
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9. Cho‘zilgan prujina E
p
=2 J potensial energiyaga ega. Bu nimani bildiradi? 
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10. Bir xil radiusdagi alyuminiy va qo‘rg‘oshin sharlari bir xil balandlikda. 
Qaysi biri ko‘proq potentsial energiyaga ega? 
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11. Nima uchun sportchi uzunlikka sakrashdan oldin yuguradi? 

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12. 2 km balandlikda massasi 20 mg bo‘lgan yomg‘ir tomchisining potensial 
energiyasi qanday?
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13. 500 g massali jism stoldan 2 m balandlikda joylashgan. Uning potentsial 
energiyasi qanday? Jismning stolga nisbatan potensial energiyasini nol deb oling. 
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14. V=5 dm
3
hajmli silvinit (tuzli choʻkindi togʻ jinsi) 
bo‘lagi qandaydir chuqurlikdan ko‘tarilganda uning potensial 
energiyasi ∆E
p
=41 kJ ga ortgan bo‘lsa, shu chuqurlikni aniqlang. 
Silvinitning zichligini suvning zichligidan ikki marta katta deb 
hisoblang.
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15. m=60 mg massali yomg‘ir tomchisi ϑ=10 m/s o‘zgarmas tezlik bilan 
tushyapti. Uning Yer sirtidan h=200 m balandlikdagi kinetik va potensial 
energiyalarini toping. Bu va bundan keyingi masalalarda g=10 N/kg ga teng deb 
qabul qiling.
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16. Vertikal yuqoriga otilgan m=0, 2 kg massali to‘p h=20 m balandlikka 
ko‘tarildi. Trayektoriyaning eng yuqori nuqtasida to‘pning kinetik va potensial 
energiyasini aniqlang.
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17. Yer sirtidan h=0,1 km balandlikda burgut E
p
=4 kJ potensial energiyaga ega. 
Burgutning massasi qanchaga teng? 
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18. ϑ=5 m/s o‘zgarmas tezlik bilan tushayotgan m=70 kg massali 
parashutchining t=5 s vaqt oralig‘idagi kinetik va potensial energiyalarining 
o‘zgarishini aniqlang.
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19. h=320 m balandlikda tog‘ daryosining 1 m
3
suvi qancha potensial 
energiyaga ega? Bu energiyani m=10 t massaga ega, ϑ=54 km/h tezlikli 
avtomobilning kenetik energiyasi bilan taqqoslang. 
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20. h=2,2 m huqurlikka ega to‘g‘ri burchakli yerto‘la, m=6 t massali kartoshka 
bilan tepasigacha to‘ldirilgan. Yerto‘ladan kartoshkani chiqarish uchun eng kamida 
qancha ish bjarish kerak? 
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21. Bir xil materialdan tayyorlangan uchta metal 
kubning (rasmga.q) potensial energiyalarini solishtiring.
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22. Qirrasining uzunligi a=10 cm bo‘lgan bir jinsli 
parafin kub poldan h