Vectors, and some weried stuff that I dont get

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Homework Help Overview

The discussion revolves around understanding vector addition and the specific components of a resultant vector, referred to as Vector D, in a given coordinate system. Participants express confusion regarding the definitions and calculations involving the vectors presented.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to clarify the nature of Vector D and its relationship to Vectors A and B, questioning the visibility and definition of D. Some participants suggest that D can be constructed using a specific rule involving A and B, while others emphasize the importance of adhering to the original coordinate axes for the components of D.

Discussion Status

Participants are exploring different interpretations of how to compute Vector D, with some providing guidance on using a specific formula. There is an acknowledgment of the need to consider the original coordinate system, and while some hints are offered, there is no explicit consensus on the approach to take.

Contextual Notes

The original poster expresses frustration with the textbook's explanations and indicates that this is a homework-related query, suggesting that there may be constraints on how the problem can be approached or discussed.

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http://img30.imageshack.us/img30/1265/34711100.png


What is Vector D?? I only see Vector A and B, not the invisible one? Well you can define a new coridnate system X prime and Y prime and not worry about the degrees. But the other stuff is all greek to me. Book doesn't help :(, so any help is appreciated
 
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Since this is homework, in the future it should be posted in the homework help section.

It looks to me like D is the vector constructed as per the rule given on the left hand side, namely 4.7 (A+B).

Keep in mind that while it may seem like a good idea to use a tilted coordinate axis defined by A and B, the question asks for the components of the resultant vector D in terms of x and y, the original coordinate axes. So you will have to deal with the angle eventually.
 
You are given a "recipe" for computing D. Simply do the specified operations. The result is D.
 
Nabeshin said:
It looks to me like D is the vector constructed as per the rule given on the left hand side, namely 4.7 (A+B).

4.7A + B, without the parentheses.
 
kbaumen said:
4.7A + B, without the parentheses.

Right. Order of operations gets me every time.
 

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