Physics, 11.10.2021 04:10 savannahbrookec2896
Một lò xo nhẹ, treo thẳng đứng có độ cứng k = 100 N/m. Vật nhỏ khối lượng m = 500 g được treo vào đầu dưới của lò xo, dao động điều hòa quanh vị trí cân bằng O. Tính lực đàn hồi của lò xo khi vật trên vị trí cân bằng 9 cm, lấy g = 10 m/s2 .
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Một lò xo nhẹ, treo thẳng đứng có độ cứng k = 100 N/m. Vật nhỏ khối lượng m = 500 g được treo vào đầ...
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