A pulse travelling on a string is represented by the function

,


where a = 5 mm and υ = 20 cm s1. Sketch the shape of the string at t = 0, 1 s and 2 s. Take x = 0 in the middle of the string.



The maxima in the x-y plane will be the amplitude of the wave.




For maxima, dy/dx=0




So, the amplitude will be,



For velocity in x direction, the function of x and t will be when y=a;




At, t=0;


X=0 cm



At t=1 s


X=20 cm



At t=2 s


X=40 cm



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