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hoaibaodthu
2 năm trước
Bài 1. Một máy kéo có công suất là 80kW a. Con số đó cho ta biết điều gì? b. Tính công của máy sinh ra trong 2h c. Tính quãng đường máy kéo đi được biết lực kéo của máy là 3000N d. Tính vận của của máy kéo
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