Physics, 24.08.2021 05:50 cravetyler3989
caus. Một con lắc lò xo gồm vật có khối lượng m = 100g lò xo có d hat Q cing k=100 N/m.] Lây 10 = pi ^ 2 Tácdụng vào con lắc lò xo một ngoại lực tuần hoàn F = F_{0} * cos(2pi * f * t) . Khi tần số ngoại lực tăng từ 3 Hz đến 10 Hzthì biên độ của con lắc sẽ :A. luôn tăng. C. tăng rồi giảm. D. giảm rồi tăng. B. luôn giảm.
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caus. Một con lắc lò xo gồm vật có khối lượng m = 100g lò xo có d hat Q cing k=100 N/m.] Lây 10 = pi...
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