Ishqalanish. Ishqalanish kuchi. Tabiatda va texnikada ishqalanish

Ekspremental topshiriq (mexanik energiyaning saqlanish qonuni) 
1. Ko‘tarilgan jismning potentsial energiyasi jismning massasiga va u 
ko‘tarilgan balandlikka bog‘liq. Buni isbotlash uchun tajribalar o‘ylab toping. 
2. Kinetik energiya jismning massasiga va uning harakat tezligiga bog‘liq. Buni 
isbotlavchi tajribalarni o‘ylab ko‘ring. 
3. Cho‘zilgan rezina tasmaning potentsial energiyasini aniqlash usulini o‘ylab 
ko‘ring. 
4. Yerga mop (shvabra) qo‘ying. Uni tik qo‘yish uchun qanday ish qilish kerak? 
Muammoni hal qilish uchun dinamometr va o‘lchagichdan foydalaning. 

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5. Stol ustiga 10 ta shashka donalari qo‘ying. Shashka donalarni vertikal 
holatda ustma-ust taxlash uchun bajarilgan ishni aniqlang. Ishni aniqlash uchun 
millimetr o‘lchagich, dinamometri yoki prujinali tarozisidan foydalaning. 
Richag va qiya tekislik 
1. Oddiy mexanizmlar deb nimaga aytiladi va ular qaysi maqsadda 
qo‘llaniladi? 
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2. Richag nima va richagning muvozanat qoidasi nimadan iborat? 
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3. Nima uchun eshik tutqichlari eshik osiladigan oshiq-moshiqlardan uzoqda 
o‘rnatiladi? 
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4. Rasmda qayiq va Venetsiyalik gondol tasvirlangan. Eshkak eshishda qanday 
oddiy mexanizmdan foydalaniladi? U qayiqchilarga qanday yordam beradi?
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5. Chap yelkadagi A nuqtaga F
1
=4,5 N kuch ta’sir qiladi. O‘ng yelkadagi B 
nuqtaga vertikal pastga yo‘nalgan qanday kuch qo‘yilsa richak (rasm.q) 
muvozanatda bo‘ladi? 
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6. A nuqtadagi (205-rasm) yelkaga 4 N kuch ta’sir qiladi. Richak muvozanatda 
qolishi uchun B nuqtada yelkaga qanday vertikal yuqoriga yo‘nalgan kuch qo‘yilishi 
kerak? 
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7. Rasmdagi odamlarning qaysi birining massasi katta? Javobingizni 
tushuntiring.
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8. A nuqtaga F
1
=2 N kuch ta’sir qiladi. Natijada richak muvozanatda qolishi 
uchun B nuqtaga qanday vertikal pastga yo‘nalgan kuch qo‘yilishi kerak (206-
rasm)? 
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9. 1-yukning og‘irligi 90 N ga teng bo‘lsa(2-rasm). 2-yukning og‘irligini 
aniqlang. 
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10. Richagning o‘ng uchiga ta’sir qiluvchi kuch 40 N bo‘lsa, yukning massasini 
aniqlang (3-rasm).
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11. Yuklarning umumiy massasi 48 kg (4-rasm). Har bir yukning massasini 
aniqlang. 
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12. 209-rasmda ko‘rsatilgan richak tayanchga qanday kuch bilan bosadi? 
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13. 2-yukning massasi 18 kg (209-rasmga qarang). Richak muvozanatda bo‘lsa, 
1-yukning massasini aniqlang. 
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14. 1-yukning massasi 10 kg (210-rasm). Richak muvozanatda bo‘lsa, 2-
yukning massasini aniqlang. 
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15. Velosipedning qaysi qismlari (212-rasm) richaglardan iborat? Tayanch 
nuqtasini, kuchlarni qo‘yilish nuqtalarini va richaglarning elkalarini ko‘rsating. 
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16. 1-yukning massasi 1 kg (224-rasm), 3-yukning massasi 2 kg. Richak 
muvozanatda bo‘lsa, 2-yukning massasini aniqlang. 
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17. Massalari 14 va 26 kg bo‘lgan yuklar uzunligi 2 m bo‘lgan ingichka bir 
jinsli richagning uchlariga osilgan. Richak muvozanatda bo‘lishi uchun tayanchni 
richagning o‘rtasidan qanday masofada joylashtirilishi kerak? 
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18. 5-rasmda ko‘rsatilgan qurilmalarning ishlash 
printsipini tushuntiring. Kerakli o‘lchovlarni amalga 
oshirgandan so‘ng, ushbu qurilmalar yordamida olinishi 
mumkin bo‘lgan kuchning eng katta qiymatini aniqlang.

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19. 1-yukning massasi 10 kg, 2-yukning massasi 5 kg (6-rasm). 3-yukning 
massasini aniqlang. Richak tayanchga qanday kuch bilan bosadi? 
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20. Richagning massasi 500 g ekanligini hisobga olib, 9-masalani yeching. 
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21. Qo‘shimcha ma’lumot manbalaridan foydalaning va inson tanasidagi 
richaglar haqida ma’lumot toping. Olingan ma’lumotlar asosida masala tuzing va 
uni yeching. 
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