The graphic of |F||D|=1 is hyperbola or ellipse

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Discussion Overview

The discussion revolves around the equation |F||D|=1, which is presented as a formulation of the law of the lever in equilibrium. Participants explore whether the graphical representation of this equation results in a hyperbola or an ellipse, depending on the definitions of |F| and |D|. The scope includes theoretical interpretations and mathematical reasoning related to the law of the lever.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant claims that if |F|=|x-y| and |D|=x+y, then the equation represents a real hyperbola, suggesting a repulsive interaction.
  • Another viewpoint suggests that if |F|=x-iy and |D|=x+iy, the equation leads to x^2+y^2=1, which could be interpreted as a real ellipse or an imaginary hyperbola, indicating an attractive interaction.
  • A participant requests clarification on the meanings of |F| and |D| to better understand the discussion.
  • Further clarification is provided, stating that |F| represents the force acting at a distance |D| from the center of the lever, and introduces the common version of the law of lever.
  • One participant expresses a sentiment that the discussion may have reached a conclusion, though it is unclear what that conclusion might be.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on whether the graphical representation is a hyperbola or an ellipse, and there are competing interpretations of the equation based on different definitions of |F| and |D|.

Contextual Notes

There are limitations in the discussion regarding the definitions of |F| and |D|, as well as the assumptions underlying the interpretations of the graphical representations. The mathematical steps leading to the conclusions are not fully resolved.

dedaNoe
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|F||D|=1 is the simplest form of the law of lever in equilibrium.
If |F|=|x-y| and |D|=x+y then |x^2-y^2|=1 is an real hyperbola.
In this case the interaction is repulsive.
If |F|=x-iy and |D|=x+iy then x^2+y^2=1 is an real ellipse or imaginary hyperbola.
In this case the interaction is attractive.

www.geocities.com/dedaNoe
www.geocities.com/dedaNoe/lever.pdf
 
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Perhaps it would help us understand what in the world you are talking about if you told us what F and D mean!
 
Yeah sure!

F is the force acting in D distance from the center of the lever.
The common version of the law of lever is:
|F||D|=|F_r||D_r|=1
here |F_r| is the sum of the forces from the rest of the system and
|D_r| is the sum of the distances from the rest of the system.

I have more on this on my page:
www.geocities.com/dedaNoe
section "Dynamics of the lever".
 
I think we've seen enough.
 

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