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2 năm trước
Bài 6: Tính quãng đường mà vật rơi tự do đi được trong giây thứ hai. Trong khoảng thời gian đó, vận tốc của vật đã tăng lên bao nhiêu? Bỏ qua lực cản của không khí. Lấy gia tốc rơi tự do g = 10 m/s^2
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