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Con lắc lò xo
chiều dài lò xo trong quá trình dao động
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Độ biến dạng của lò xo khi cân bằng:
delta L = mg/k
Chiều dài lò xo khi cân bằng:
Lcb = Lo + delta L
Chiều dài lớn nhất:
Lmax = Lcb + A
Chiều dài nhỏ nhất:
Lmin = Lcb - A
Chiều dài lò xo khi ở li độ x:
Lx = Lcb + x
Con lắc lò xo nằm ngang:
delta L = 0
Con lắc lò xo dựng ngược:
delta L < 0
( thay giá trị âm)
Con lắc lò xo nằm nghiêng góc a:
delta L = (mg.sina)/k
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