Physics Q: What Law Applied to Lead Boat Against Wind?

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Discussion Overview

The discussion centers around the application of physics principles in sailing a boat against the wind. Participants explore the laws and concepts that may be relevant to this scenario, particularly focusing on aerodynamics and the mechanics of sail design.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant suggests that the principles of aerodynamics are applicable, comparing the function of a sail to that of an airplane wing, where the shape of the sail creates a pressure difference that propels the boat forward.
  • The same participant describes how the curvature of the sail affects airflow, leading to varying speeds and pressure on either side, which generates lift and thrust against the wind.
  • Another participant expresses gratitude for the explanation and indicates a willingness to further explore the topic through external resources.

Areas of Agreement / Disagreement

There is no explicit disagreement noted, but the discussion primarily reflects one participant's perspective on the aerodynamic principles involved. The exploration of the topic remains open-ended without a definitive consensus.

Contextual Notes

The discussion does not delve into specific laws of physics or mathematical formulations, and it relies on general descriptions of aerodynamic principles without detailed definitions or assumptions.

Who May Find This Useful

Individuals interested in the physics of sailing, aerodynamics, or those seeking to understand the mechanics behind sailing techniques may find this discussion relevant.

vu95112
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I read one book. The author says that, in the old day, people know to apply physics to lead a boat against the wind. Anyone can help me on this question. What is the law in physics do they apply? Thank You.
 
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This i believe has to do with aerodynamics. A sail works just like an airplane wing, if you point the boat against the wind, the sail will have a curve like an airplane wing. Let's say that this bulge is towards the left. So air will flow faster at the left side and slower at the other because it has to travel a greater distance to get to the other side. Just like an Airplane wing(i know i keep repeating this but its exactly the same principle). So the air going faste will have less pressure than the slower moving air. And so if you take the pressure difference and multiply it times the area of the sail you will see that the force will actually push it forward against the wind.
If this doesn't make sense look at my diagram i am about to submit

FoxCommander
 
Sorry i couldn't get my scanner to work so just look it up on google and you should be able to make sense of it using my description
 
Hello FoxCommander,

Thank you very much for your help. I got it. I can search it on Google. I wish you have a very nice Thanksgiving.
Vu95112
 
Thanks and you have a wonderful Thanksgiving yourself!


FoxCommander
 

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