How Do You Determine Maximum Angular Separation in Vector Problems?

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Discussion Overview

The discussion revolves around determining the maximum angular separation in vector problems, specifically in the context of planetary orbits, as presented in a physics problem involving Venus and Earth. Participants explore the concept of angular separation from different perspectives, seeking clarity on how to approach the problem.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses confusion about the term "maximum angular separation" and requests hints or assistance on how to begin solving the problem.
  • Another participant suggests that if Venus had a larger orbit than Earth, the maximum angular separation could be 180 degrees, proposing a visual approach to understand the angles involved.
  • A different viewpoint argues that the angular separation would be 0 degrees when Venus is directly behind or in front of the sun from Earth's perspective, indicating a misunderstanding of the maximum separation concept.
  • Another participant clarifies that while the angular separation is zero when Venus is aligned with the sun, this does not represent the maximum separation, and recommends drawing a diagram of the orbits for better understanding.
  • One participant critiques the problem's phrasing, suggesting that it requires placing Earth at the center of a coordinate system and analyzing Venus's position in its orbit to determine when the angle with the x-axis is maximized.

Areas of Agreement / Disagreement

Participants express differing interpretations of the maximum angular separation concept, with no consensus reached on the correct approach or understanding of the problem. Some participants propose visual methods while others focus on specific angular measurements, leading to a contested discussion.

Contextual Notes

The discussion highlights potential ambiguities in the problem statement and the need for clear definitions of angular separation in the context of planetary orbits. Participants rely on visual aids and coordinate systems to clarify their reasoning.

Who May Find This Useful

This discussion may be useful for students or individuals interested in understanding angular separation in vector problems, particularly in the context of celestial mechanics and orbital dynamics.

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So I was given this on a recent physics problem.

http://prntscr.com/5s8u0u

I understand vectors completely, I just don't know where to start. Specifically where it mentions maximum angular separation am I confused. Any type of hints/assistance is appreciated.
 
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If the orbit of Venus had a larger radius than the orbit of Earth, then the maximum angular separation would be 180 degrees.
Draw the orbit of Venus. Imagine Earth as being in a fixed position with Venus going around it's orbit. When would the angle (as measured from Earth) between the sun (the center of orbit) and Venus be the largest?
It's difficult for me to explain without a picture, but hopefully this helps.

P.S.
Next time it would be helpful if you just copied the problem over here instead of providing a link.
(Some helpful people may skip your problem if they see just a link.)
 
It would be 0 degrees would it not? You would basically have the vector running from Earth, through the sun, and then to Venus. At least that's how I imagine it.

Also, sorry for posting this question in the wrong sub-forum.
 
When Venus is directly behind or directly in front of the sun (as viewed from Earth) then the angular separation would be zero degrees, but that is not the maximum. I suggest drawing a picture of the orbits.
 
The problem is poorly posed. I think that they want you to place the Earth as the center of your coordinate system, and place the sun along the + x axis. Then, I think they want you to move Venus to various locations in its orbit around the sun and draw the line from the Earth to Venus. Depending on where Venus is placed, the line makes an angle with the x axis. They want you to focus on when the angle is maximum. At least that's my spin.

Chet
 

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