1-nazorat ishi nazorat shakli: Yozma ish 1

7-NAZORAT ISHI 
 
Nazorat shakli: Yozma ish
 
1 Tezligi 0.3 m/s, massasi 30 t bo’lgan vagonni tezligi 0.2 m/s, massasi 
20 t bo’lgan vagonni quvib yetdi va unga ulanib qoldi. Vagonning 
birgalikdagi tezligi qanday. 
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2 Necha Nyuton kuch jismni 2.5 m masofaga ko’chirganda 400 J ish 
bajaradi? 
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72 km/soat tezlik bilan harakatlanayotgan, massasi 50 kg bo’lgan 
meteorning kinetik energiyasi qanday (kJ)?
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