Tackling a Physics Problem: My Attempt

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Homework Help Overview

The problem involves analyzing forces and their resultant direction, likely within the context of vector addition in physics. The original poster discusses their attempt and acknowledges a mistake in the placement of the thread.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the mathematical relationships between the forces and their components, with one participant suggesting a method to find a minimum condition for one of the forces. There is also a concern about the accuracy of the original diagram and whether the proposed method could still lead to a solution.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem and questioning the validity of the original diagram. Some guidance has been offered regarding vector representation, but no consensus has been reached on the approach or solution.

Contextual Notes

There is mention of a diagram that may not accurately represent the forces involved, which could affect the understanding of the problem. The original poster also notes a mistake in the thread's categorization.

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Homework Statement




The problem and my attempt are given

Originally i put this in the upper level physics section, i made a mistake, it should go here.

[PLAIN]http://img266.imageshack.us/img266/5495/lasts02can.jpg
 
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The direction of the resultant is given by

tan75 = ( F3 + F2sinθ )/(F1 - F2cosθ)

F1tan75 - F2cosθtan75 = F3 + F2sinθ

Find F2. The condition for minimum F2 cab be found by finding d(F2)/dθ and equating it to zero. You will get the value of θ.
 
So my diagram was completley off. Was there a way to achieve the solution using my method?
 
Last edited:
Matt1234 said:
So my diagram was completley off. Was there a way to achieve the solution using my method?

Draw all the vectors at the point of action.
 

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