Short Note

A wave pulse passing on a string with a speed of 40 cm s^{−1} in the negative *x*-direction has its maximum at *x* = 0 at *t* = 0. Where will this maximum be located at *t* = 5 s?

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#### Solution

Given,

Speed of the wave pulse passing on a string in the negative *x*-direction = 40 cms^{−1}

As the speed of the wave is constant, the location of the maximum after 5 s will be*s = v* × *t*

= 40 × 5

= 200 cm (along the negative *x*-axis)

Therefore, the required maximum will be located after *x* = −2 m.

Concept: Speed of Wave Motion

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