Conceptual Standing Wave Question

  • Thread starter MyNewPony
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  • #1
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Homework Statement



If you take snapshots of a standing wave on a string, there are certain instants when the string is totally flat.

What has happened to the energy of the wave at those instants?


The Attempt at a Solution



I'm assuming that nothing has happened to the energy. At that instant in time, even if the displacement of the wave is zero, it does not imply that the wave is stationary, therefore, it still has a velocity. Thus, there remains kinetic energy in the wave.

Am I on the right track?
 

Answers and Replies

  • #2
alphysicist
Homework Helper
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Hi MyNewPony,

Homework Statement



If you take snapshots of a standing wave on a string, there are certain instants when the string is totally flat.

What has happened to the energy of the wave at those instants?


The Attempt at a Solution



I'm assuming that nothing has happened to the energy. At that instant in time, even if the displacement of the wave is zero, it does not imply that the wave is stationary, therefore, it still has a velocity. Thus, there remains kinetic energy in the wave.

Am I on the right track?

Yes, that sounds right to me.
 

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