Waves can cause the displacement of an object.

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Discussion Overview

The discussion revolves around the question of whether waves can cause the displacement of objects, examining various types of waves such as water waves and wind waves. Participants explore theoretical and experimental perspectives, addressing misconceptions and clarifying definitions related to wave behavior and object movement.

Discussion Character

  • Debate/contested
  • Exploratory
  • Technical explanation

Main Points Raised

  • Some participants assert that waves cannot cause the displacement of objects, citing theoretical models where water waves exhibit no net horizontal motion.
  • Others argue that waves, particularly wind waves, can indeed cause displacement, providing examples such as wind moving paper and surfers riding waves.
  • A participant questions the role of wind in wave generation and its relation to object movement, suggesting that sailboats move due to wind rather than water waves.
  • Concerns are raised about the distinction between waves that carry energy without matter transport and those that can move objects within a medium.
  • One participant reflects on their learning experience, indicating confusion about the nature of waves and their ability to displace objects, while acknowledging differing views from their physics teacher.
  • Another participant emphasizes that while some waves do not transport matter, there are waves that can cause displacement of objects.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether waves can cause the displacement of objects. Multiple competing views remain, with some asserting that waves can cause displacement under certain conditions while others maintain that they cannot.

Contextual Notes

Limitations include varying definitions of waves, the distinction between energy transport and matter transport, and unresolved interpretations of experimental observations. The discussion reflects differing understandings of wave mechanics and their implications for object movement.

Karimspencer
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Now it's known that waves can't cause the displacement of an object but i made a few experiments that proves it can. For example , wind can cause a wave the can move a piece of paper. However, a water wave can't cause the displacement of and object but other waves like wind can cause that waves can. So i think that it depends on the wave itself.

If there are any objections towards this post , please tell me in the comments below.
 
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Karimspencer said:
Now it's known that waves can't cause the displacement of an object
Can you provide any references for that?

Waves can cause a displacement of objects. However, the displacement of objects is not required to have waves. Maybe this caused the misconception?

a water wave can't cause the displacement of and object
What about surfers? ;)
 
mfb , surfers usually move themselves before they surf by rowing the surfboard at first. You can try it by just standing in the middle of the water in the beach and letting a water wave come by you and it will not move you. However , my objection is about wind waves that can carry matter ...
 
So you are thinking sail boats don't move?

When you say waves can't move things you are speaking of a purely theoretical ocean wave in which the water moves in an elliptical path, with essentially no net horizontal motion. This in NOT related in any way to the wind nor does it address currents in the water which will cause a net horizontal motion.
 
Thank you for your feedback integral but don't sail boats move because of the wind and not because of the water waves?
 
Absolutly, but you are the one who broght the wind into consideration. I was not sure why you thought it had anything to do with your question.
 
Karimspencer said:
Now it's known that waves can't cause the displacement of an object but i made a few experiments that proves it can. For example , wind can cause a wave the can move a piece of paper. However, a water wave can't cause the displacement of and object but other waves like wind can cause that waves can. So i think that it depends on the wave itself.

If there are any objections towards this post , please tell me in the comments below.

Wind is not a wave. It is the movement of a fluid.
 
Karimspencer, Richard Feynman said "A good scientist always tries to prove himself wrong." (from my memory) There is a great lesson in that for all of us.

Now, you wrote in your opening post "a water wave can't cause the displacement of and (sic) object..." That seems to be mistaken, expecially considering this: Go over to Japan and ask some folks there if a water wave can cause the displacement of an object. You may want to revise your statement, and then try asking your questions again. All of us here are learning.

Cheers, Bobbywhy
 
Now i understand the confusion everybody... Now i have learned in school that a wave only carries energy and not matter. I tried if a water wave could cause the displacement of an object and it didn't work(But maybe i was wrong about that). And then i asked my physics teacher if a wind can cause a wave and she said yes and since i have seen wind carry paper , i told myself that a wave can cause the displacement of an object. As you see , i am trying to prove that a wave can cause the displacement of an object but my physics teacher says that it's a known fact that it doesn't. So, i then made a discussion on this forum to see what you guys think.

Anyway, thank you all for your feedback.
 
  • #10
No, what your physics teacher actually said (or should have said, or meant) is that you can have waves without matter transport. Many types of waves propagate through a medium without any displacement of this medium (permanent change of its position). However, there are waves which transport matter, too.
A different question is whether waves in a medium can move some objects within this medium or not. And they can do this.

Another, unrelated thing, is wind, which is (on human scales) not wave-like, but a permanent flow of air in one direction.
 

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