How Do You Calculate Vector Sums and Differences Graphically?

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Homework Help Overview

The discussion revolves around calculating vector sums and differences graphically, specifically focusing on two vectors: Vector A, which is 3.00 units along the positive x-axis, and Vector B, which is 4.00 units along the negative y-axis. Participants are exploring how to graphically represent the addition (A + B) and subtraction (A - B) of these vectors.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the graphical representation of vectors, including the use of the parallelogram method for vector addition. There are questions about the correct interpretation of vector components and the resulting angles. Some participants express confusion about the graphical methods and the calculations involved in determining the resultant vector's magnitude and direction.

Discussion Status

The discussion is ongoing, with several participants attempting to clarify their understanding of vector addition and subtraction. Some guidance has been offered regarding the graphical methods, and there is active engagement in exploring different interpretations of the problems presented.

Contextual Notes

Participants mention challenges with understanding the concepts due to teaching methods and textbook explanations. There is also a focus on ensuring that the graphical representations maintain the correct magnitude and direction of the vectors involved.

  • #61
But you know its horizontal and vertical coordinates, right?
How can you calculate the tangent of the angle using that info?
 
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  • #62
the figure isn't a right triangle though
 
  • #63
You are to find the resultant vectur's angle to the x-axis; how can you construct a triangle in such a manner that the coordinates you've been given will help you find that angle?
 
  • #64
OOO I got it :D

extend the Line downward so the verticles of the triangle are

tan^-^1 = 4.5/2.6

(0,0) --> (2.6,0) --> (2.6,4.5)
 
  • #65
You should get 60 degrees..
 
  • #66
Yep I got 60 degrees 59.9 i think. Thanks for your help :D

nice i think i got section 3.2 and 3.3 of my textbook down ahah... tommo I will probably ask about projectile motion, hopefully you'll help me again. The textbook leaves out a lot of information. Like it leaves out little steps.
 
  • #67
No problem..
 
  • #68
its an emergency...i really need to know this...

can two vectors representing two different physical quantities be equal?

can force and displacement be equal vectors if they are in same direction and have same magnitude?? doesn't representing different phy. quantities makes them different vectors?
 
  • #69
I hate vectors! I'm in physics A and I don't get it, even though I understand all of the force, energy, and projectile motion stuff.
 

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