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 (pi )(2))cm,-|||-1)_求它们的合振动方程;-|||-2)_另有一同方向的简谐振动 _(3)=2cos (2pi t+(varphi )_(3))cm, 问当-|||-ϕ3为何值时, _(1)+(x)_(3) 的振幅为最大值?1) )(可用旋转

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

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

32-5 一物体同时参与两个同方向的简谐振动:-|||-_(1)=0.04cos (2pi t+dfrac (1)(2)pi ) (SI单位), _(2)=0.

5.一质点同时参与两个在同一直线上的简谐振动:-|||-_(1)=0.04cos (2pi t+dfrac (pi )(2))m, _(2)=0.03cos (

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

2.单选题-|||-已知两个简谐振动为 _(1)=4cos (2pi t+(1)^n)cm ,-|||-._(2)=2cos (2pi t-6pi /c)cm

已知两个同方向、同频率的简谐运动的运动的方程分别为： _(1)=0.06cos (2pi t+dfrac (pi )(3))(m) , _(1)=0.06cos

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

6.5178:一质点沿x轴作简谐振动,振动方程为 =4times (10)^-2cos (2pi t+dfrac (1)(3)pi )(S1) t=-|||-0

两个同方向、同频率的简谐振动，振动方程分别为：x_1 = 6cos(10t - (pi)/(6))cm，x_2 = 8cos(10t + (pi)/(3))cm