Finding Impossible Force with Two Given Forces

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Homework Help Overview

The discussion revolves around a problem involving two forces, 6 N and 2 N, and the task of identifying a force that cannot be produced by these two. The context suggests a focus on vector addition and the geometric interpretation of forces.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore the nature of the question, with some questioning whether it seeks an example of an impossible force. Others suggest drawing triangles to visualize the problem and consider the implications of vector addition.

Discussion Status

The discussion is active, with participants sharing insights about the geometric representation of forces. Some have attempted to apply the cosine rule, indicating a progression in understanding the problem. There is a recognition of the need to critically evaluate the possible answers.

Contextual Notes

The problem is framed as a multiple-choice question, which introduces constraints on the possible answers. Participants note that some options can be produced, while others cannot, prompting further exploration of the underlying principles.

sharkey1314
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Homework Statement


I got two forces acting on an object. I have the magnitude of the forces, 6 N and 2 N. Then I'm asked to find out what force is impossible to produce with these two forces.


Homework Equations





The Attempt at a Solution



I have no idea where to begin with. Maybe i didn't think hard enough...
 
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Are you sure it's not just asking for an example of a force that can't be produced? This is a very weird question because the number of possible answers is infinite.
Post the exact wording of the question.
 
there's a choice between 2N and 6N. Sorry. It's a multiple choice question. The other 2 answers are 8N and 4N which is quite obviously can be produced.
 
sharkey1314 said:
there's a choice between 2N and 6N. Sorry. It's a multiple choice question. The other 2 answers are 8N and 4N which is quite obviously can be produced.
Try drawing some triangles.You will see that only one of those vectors can be produced by adding the given vectors.
 
It will be an isosceles triangle right ?
 
Okay i found out the answers by using cosine rule. Are there some insights on this matter ? lol..
 
sharkey1314 said:
It will be an isosceles triangle right ?

Yes since you want to get either 6N or 2N using a 6N and a 2N.edit:
sharkey1314 said:
Okay i found out the answers by using cosine rule. Are there some insights on this matter ? lol..

The exercise is meant to teach you to watch out for answers that do no make sense.
 
Last edited:

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