Question concerning the direction of the vector r in the FL

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Discussion Overview

The discussion revolves around the direction of the vector r as presented in the Feynman Lectures of Physics, specifically in Chapter 13.3. Participants are examining the implications of the equations and figures related to this vector, seeking clarity on its orientation in the context of the material discussed.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the direction of vector r in equation 13.5, suggesting it should point from ##m_{j}## to ##m_{i}##.
  • Another participant refers to figure 13.2, indicating that the convention shows the vectors pointing from 1 to 2.
  • A participant seeks clarification on whether the reference is to equations 13.15 and 13.16 instead of 13.5.
  • Another participant confirms that the vector should be consistent across both equations mentioned.

Areas of Agreement / Disagreement

The discussion reflects some uncertainty regarding the specific equations being referenced and the direction of the vector r, with no clear consensus reached among participants.

Contextual Notes

Participants are navigating potential ambiguities in the equations and figures, and there may be dependencies on the definitions provided in the text that are not fully resolved.

3102
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Hello! I've got a question concerning the direction of the vector r in the Feynman Lectures of Physics in Chapter 13.3 http://www.feynmanlectures.caltech.edu/I_13.html#Ch13-S3

Which direction does the vector r in equation 13.5 point in?
The long equation before equation 13.6 suggests that it should point from ##m_{j}## to ##m_{i}##.

Is that correct?
 
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The convention is given in figure 13.2: the vectors point from 1 to 2.
 
Do you mean 13.15 and 13.16?
 
dauto said:
Do you mean 13.15 and 13.16?
The vector should be the same in both equations.
 

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