一平面简谐波以速度u沿x轴正方向传播,在t=t'时波形曲线如图所示.则坐标原点O的振动方程为[img=237x134]18032de39d86d2f.png[/img]
A: y=acos[p u( t-t¢)/b-p/2]
B: y=acos[u( t-t¢)/b+p/2]
C: y=acos[2p u( t-t¢)/b-p/2]
D: y=acos[p u( t+t¢)/b+p/2]
A: y=acos[p u( t-t¢)/b-p/2]
B: y=acos[u( t-t¢)/b+p/2]
C: y=acos[2p u( t-t¢)/b-p/2]
D: y=acos[p u( t+t¢)/b+p/2]
举一反三
- 【单选题】一平面简谐波,其振幅为 A ,频率为 n .波沿 x 轴 负 方向 传播.设 t = t 0 时刻波形如图所示.则 x = 0 处质点的振动方程为 A. y=Acos[2π n (t+t 0 )+π/2] B. y=Acos[2π n (t-t 0 )+π/2] C. y=Acos[2π n (t-t 0 )-π/2] D. y=Acos[2π n (t-t 0 )+π]
- 一平面简谐波以速度\(u\)沿\(x\)轴正方向传播,在\(t=t'\)时波形曲线如图所示.则坐标原点\(O\)的振动方程为 A: \(y=a\)cos[\(\frac{u}{b}\)\((t-t')\)\(+\frac{\pi}{2}\)] B: \(y=a\)cos[2\(\pi\)\(\frac{u}{b}\)\((t-t')\)\(-\frac{\pi}{2}\)] C: \(y=a\)cos[\(\pi\)\(\frac{u}{b}\)\((t+t')\)\(+\frac{\pi}{2}\)] D: \(y=a\)cos[\(\pi\)\(\frac{u}{b}\)\((t-t')\)\(-\frac{\pi}{2}\)]
- 一振幅为A、周期为T、波长为λ的平面简谐波沿x轴负向传播,在x=λ/2处,t=T/4时振动相位为π,则此平面简谐波的波动方程为()。 A: y=Acos(2πt/T-2πx/λ-π/2) B: y=Acos(2πt/T-2πx/λ+π/2) C: y=Acos(2πt/T+2πx/λ+π/2) D: y=Acos(2πt/T+2πx/λ-π/2)
- 一振幅为A、周期为T、波长为λ平面简谐波沿x负向传播,在x=λ处,t=T/4时振动相位为π,则此平面简谐波的波动方程为:() A: y.=Acos(2πt/T-2πx/λ-π) B: y=Acos(2πt/T+2πx/λ+π) C: y=Acos(2πt/T+2πx/λ-π) D: y=Acos(2πt/T-2πx/λ+π)
- 一振幅为A、周期为T、波长为λ平面简谐波沿X负向传播,在X=(1/2)λ处,t=T/4时振动相位为π,则此平面简谐波的波动方程为:() A: y=Acos(2πt/T-2πx/λ-1/2π) B: y=Acos(2πt/T+2πx/λ+1/2π) C: y=Acos(2πt/T+2πx/λ-1/2π) D: y=Acos(2πt/T-2πx/λ+1/2π)