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hyunran275
2 năm trước
Một con lắc lò xo gồm vật nặng và lò xo có độ cứng k = 100 N/m, dao động điều hòa với biên độ 0,05 m. Mốc thế năng ở VTCB. Khi vật nặng cách vị trí biên 4 cm thì động năng của con lắc bằng bao nhiêu ?
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