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Physics, 25.07.2021 21:00 CelesteN64
Một vật có khối lượng m vào một lò xo có độ cứng k thì vật dao động với chu kì 0.2s . Nếu treo thêm gia trọng ∆m = 225g vào lò xo trên thì hệ vật và gia trọng dao động với chu kì 0.3s . Cho π bình phương =10. Lò xo đã cho có độ cứng là
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Một vật có khối lượng m vào một lò xo có độ cứng k thì vật dao động với chu kì 0.2s . Nếu treo thêm...
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