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Physics, 17.08.2021 04:20 chandranewlon
Câu 24. Một vật nặng m được nối vào sợi dây, đầu còn lại sợi dây nối vào điểm cố định Q (xem hình vẽ). Tác dụng lên vật m một lực không đổi theo phương ngang, khi ở trạng thái cân bằng dây treo hợp với phương thẳng đứng một góc
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Câu 24. Một vật nặng m được nối vào sợi dây, đầu còn lại sợi dây nối vào điểm cố định Q (xem hình vẽ...
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