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Honghanh252
2 năm trước
Một chất điểm dao động điều hoà có pha dao động φ phụ thuộc vào thời gian. Biết quỹ đạo dài 10 cm. Tại thời điểm t = 10 s, vật đi qua vị trí có li độ A. 4,76 cm B. –2,94 cm C. 4,76 cm D. 5 1,8 0,2
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