Question

Figure shows a plot of the transverse displacements of the particles of a string at t=0 through which a travelling wave is passing in the positive x-direction. The wave speed is 20 cm/s Find a) the amplitude b) the wavelength c) the wave number and d) the frequency of the wave

Answer 1

Explanation:

Given that , v = 200m/s

a) Amplitude A = 1mm

b) wave length = 4cm

c) wave number ,n= 2π /lamda = ( 2 × 3.14 )/4 = 1.57 cm

( wave number = k )

d) frequency , f = 1/T = 26/lamda/20 = 20/4 = 5Hz

( where time period T = lamda/v )