Physics, 23.07.2021 14:00 mcalepcrager

Một con lắc lò xo, gồm lò xo nhẹ có độ cứng 50 N/m, vật có khối lượng 2 kg, dao động điều hoà dọc theo trục Ox theo phương ngang (O là vị trí cản bằng) theo phương trình x = 6cos(ωt + π/3) (cm). Tính lực đàn hồi lò
xo ở thời điềm t = 0,4π (s).
A. 150 N. B. 1,5 N. C. 300 N. D. 3,0 N

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Một con lắc lò xo, gồm lò xo nhẹ có độ cứng 50 N/m, vật có khối lượng 2 kg, dao động điều hoà dọc th...

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