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题目内容
(辽宁师范大学-普通物理)
1.弹簧振子,重物的质量为m,弹簧的倔强系数为k,该振子作振幅为A的简谐振动,当重物通过平衡位置且向规定的正方向运动时,开始计时,则其振动方程为()
A.x=Acos(√K/mt+π/2)
B.x=Acos(√K/mt-π/2)
C.x=Acos(√m/Kt+π/2)
D.x=Acos(√m/Kt-π/2)
A.x=Acos(√K/mt+π/2)
B.x=Acos(√K/mt-π/2)
C.x=Acos(√m/Kt+π/2)
D.x=Acos(√m/Kt-π/2)
参考答案