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Question

The wave function for a travelling wave on a taut string is (in SI units) s(x,t)=(0.350m)sin(10πt3πx+π/4). What are the speed and direction of travel of the wave?

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Solution

On comparing the given statement with s(x,t)=Asin(wtkx+ϕ)

The given travelling wave travels towards positive x direction.

We get w=10 π k=3π ϕ=π4

Speed of wave v=wk=10π3π=103 m/s

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