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nekominimeow
2 năm trước
Con lắc đơn chiều dài 1(m), khối lượng 200(g), dao động với biên độ góc 0,15(rad) tại nơi có g = 10(m/s^2).Ở li độ góc bằng 2/3 biên độ, con lắc có động năng là bao nhiêu?
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