已知一简谐振动_(1)=3cos (5t+dfrac (2)(3)pi ),另一个同方向简谐振动_(1)=3cos (5t+dfrac (2)(3)pi )若令两振动合成的振幅最大,则_(1)=3cos (5t+dfrac (2)(3)pi )的取值应为()。_(1)=3cos (5t+dfrac (2)(3)pi )_(1)=3cos (5t+dfrac (2)(3)pi )_(1)=3cos (5t+dfrac (2)(3)pi )_(1)=3cos (5t+dfrac (2)(3)pi )

,两个同方向同频率的简谐振动,其振动表达式分别_(1)=0.6cos (5t+dfrac (pi )(2))(m),_(1)=0.6cos (5t+dfrac

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-

两简谐振动的振动方程分别为_(1)=3cos (2pi t-dfrac (pi )(3)), _(2)=4cos (2pi t+dfrac (pi )(6))单

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

10.-|||-两同方向同频率的简谐振动的振动方程为 _(1)=6cos (5t+dfrac (pi )(2)) (SI), _(2)=2cos (5t-dfr

两个同方向简谐振动的振动方程分别为_(1)=3times (10)^-2cos (10t+dfrac (3)(4)pi )SI，_(1)=3times (10)

某质点参与_(1)=10cos (pi t-dfrac (pi )(2))cm 及 _(2)=20cos (pi t+dfrac (pi )(2))cm两个同方

【题目】某质点参与 _(1)=5cos (pi t-dfrac (pi )(2))cm 及-|||-_(2)=5cos (pi t+dfrac (pi )(2)

5-13 有两个同方向的简谐振动,它们的表达式如下:-|||-_(1)=0.05cos (10t+dfrac (3)(4)pi ), _(2)=0.06cos

两个同方向、同频率的简谐振动,它们的振动表达式分别为-|||-_(1)=0.30cos (10t+dfrac (3)(4)pi ) _(2)=0.40cos (