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-dfrac (pi )(2))-|||-(SI),则它们的合振动的振动方程应为-|||-A =8cos (5t-pi )(SI)-|||-B =4cos (5t+dfrac (pi )(2))(sin t)-|||-C =4cos (10t+dfrac (pi )(2)) (SI )-|||-D =4cos 5t(S1)

(4)两个同方向同频率的简谐振动,其振动表达式分别为-|||-_(1)=6times (10)^-2cos (5t+dfrac (1)(2)pi ) (SI单位

两个同方向同频率的简谐振动,其振动表达式分别为_(1)=6times (10)^-2cos (5t+pi /2) (SI) , _(1)=6times (1

,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

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)

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

一质点作简谐振动，其振动方程为=6.0times (10)^-2cos (dfrac (1)(3)pi t-dfrac (1)(4)pi )(SI)（1）当=6

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

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

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

6.25 三个同方向、同频率的简谐振动为-|||-_(1)=0.08cos (314t+dfrac (pi )(6))-|||-_(2)=0.08cos (31