The figure below is a representation of a simple harmonic progressive wave, progressing in the negative X- axis, at a given instant. The direction of the velocity of the particle at state P in the figure is best represented by the arrow.

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Solution

The correct option is A
$v_{p} = - v (\frac{d y}{d x})$
Here v is negative and $\frac{d y}{d x}$ is positive at point P. Hence $v_{p}$ is positive. So P is moving upwards.

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The figure below is a representation of a simple harmonic progressive wave, progressing in the negative X- axis, at a given instant. The direction of the velocity of the particle at state P in the figure is best represented by the arrow.

The correct option is A vp=−v(dydx) Here v is negative and dydx is positive at point P. Hence vp is positive. So P is moving upwards.

The correct option is A
$v_{p} = - v (\frac{d y}{d x})$
Here v is negative and $\frac{d y}{d x}$ is positive at point P. Hence $v_{p}$ is positive. So P is moving upwards.