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boycongzk1
2 năm trước
Một vật có khối lượng 3 kg rơi không vận tốc đầu từ độ cao 100 m, g=10m/s2 a, tính động năng và thế năng của vật đó tại độ cao 10m b, ở độ cao nào thì động năng bằng thế năng? Giúp em với ạ Đang cần gấp
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