Question

Figure below shows a displacement – time graph per a progressive wave.
         

1. State the amplitude of the wave. 
2. Determine the frequency of the wave. 
3. Given that the velocity of the wave is 20m/s, determine its wavelength. 

Answer 1

1. 5 cm
2. Periodic time T = 25 – 5 = 20.
   Frequency = ¹/₁= ¹/₂₀=0.05Hz
3. V + Fh => h = ^v/_F =   20    =                            400m
                                   0.05