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Question

The displacement of the particle at x = 0 of a stretched string carrying a wave in the positive x-direction is given f(t) = A sin (t/T). The wave speed is ν. Write the wave equation.

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Solution

Given,
Equation of the wave travelling in the positive x-direction at x = 0:
ft=AsintT
Here,
Wave speed = v
Wavelength, λ = vT
T = Time period
Therefore, the general equation of the wave can be represented by
y=AsintT-xνT

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