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sutu4897
2 năm trước
Một ôtô đang chuyển động với vận tốc 54km/h thì hãm phanh chuyển động chậm dần đều và dừng lại sau 10s . Vận tốc của ôtô sau khi hãm phanh được 6s là bao nhiêu?
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