XalQ ta’lim vazirligi

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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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3. 72 km/soat tezlik bilan harakatlanayotgan, massasi 50 kg bo’lgan meteorning kinetik energiyasi qanday (kJ)?

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