(较易) 已知有两个简谐振动其表达式分别为:则位移的相位比的相位____。_(1)=Acos (omega t+dfrac (pi )(2));(x)_(2)=Acos (omega t+pi )_(1)=Acos (omega t+dfrac (pi )(2));(x)_(2)=Acos (omega t+pi )_(1)=Acos (omega t+dfrac (pi )(2));(x)_(2)=Acos (omega t+pi )

一质点同时参与三个简谐振动，它们的振动方程分别为：(x)_(1)=Acos ( (omega t+frac {pi ) (2)} )，(x)_(2)=Acos

已知一质点作简谐振动振动方程为=Asin (omega t+dfrac (pi )(3))则其初相位为=Asin (omega t+dfrac (pi )(3)

有两个振动方向相同的简谐振动,其振动方程分别为-|||-_(1)=10cos (2pi t+pi )cm, _(2)=10cos (2pi t+dfrac (p

设沿弦线传播的一入射波的表达式为_(1)=Acos (omega t-2pi dfrac (x)(lambda ))，波在_(1)=Acos (omega t-

一质点同时参与同方向的简谐振动，它们的振动方程分别为_(1)=0.1cos (omega t+dfrac (pi )(4)), _(1)=0.1cos (ome

[题目]一物体作简谐振动,振动方程为-|||-=Acos (omega t+dfrac (1)(2)pi ) 则该物体在 t=0 时刻的动能-|||-与 =df

两个同方向、同频率的简谐振动，其振动方程分别为x_(1)=Acos(omega t+phi_(1))和x_(2)=Acos(omega t+phi_(2))。当

1 单选 已知两个同方向的简谐振动_(1)=2cos (1001pi t+dfrac (pi )(3)) __， _(1)=2cos (1001pi t+df

9.已知有一简谐振动 _(1)=Acos (5t+dfrac (pi )(5)), 另有一个同方向简谐振动 _(2)=Acos (5t+varphi ), 若-

如图，入射波的波函数为=Acos (omega t-dfrac (2pi )(lambda )x)-|||-__ __，在=Acos (omega t-dfra