Physics, 25.08.2021 19:30 batmandillon21

Một đoàn tàu khối lượng 50 tấn chuyển động trên đường ray nằm ngang với vận tốc không đổi 36 km/h. Công suất của đầu máy là 220,8 kW. Tính hệ số ma sát

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Một đoàn tàu khối lượng 50 tấn chuyển động trên đường ray nằm ngang với vận tốc không đổi 36 km/h. C...

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