Beam Moment Solution: Finding EIy for P/2 Force in Standard

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Discussion Overview

The discussion revolves around a homework problem related to beam moments, specifically addressing the calculation of EIy for a P/2 force in a standard beam configuration. Participants are trying to understand the reasoning behind including only one P/2 force in the initial solution and are debating the appropriate definitions and approaches to calculating moments.

Discussion Character

  • Homework-related, Debate/contested, Mathematical reasoning

Main Points Raised

  • Some participants question why the author of the solution only includes one P/2 force in their calculations.
  • One participant proposes an equation for EIy" that includes multiple forces and asks if it is correct.
  • Another participant seeks clarification on the definition of moment being used in the context of the problem.
  • There is a challenge regarding the adequacy of the definitions provided, with some participants indicating that the responses do not constitute a proper definition.
  • One participant specifies they are using the algebraic sum of the moments on one side of the section as their definition.
  • Another participant expresses confusion about the relevance of the current discussion to a question they posed in a different thread.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the correct approach to the problem or the definitions being used. Multiple competing views remain regarding the inclusion of forces and the definitions of moments.

Contextual Notes

There are unresolved questions about the definitions of moments and the assumptions underlying the proposed equations. The discussion reflects varying interpretations of the problem and its requirements.

chetzread
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Homework Statement


for the first line of solution , i don't undertsand why the author only include one P/2 force only...
RgPa5cd.jpg

Homework Equations

The Attempt at a Solution


I think it should be EIy" = 0.5Px -P(x-0.5L) -0.5P(L-x) , am i right?
 
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chetzread said:

Homework Statement


for the first line of solution , i don't undertsand why the author only include one P/2 force only...
RgPa5cd.jpg

Homework Equations

The Attempt at a Solution


I think it should be EIy" = 0.5Px -P(x-0.5L) -0.5P(L-x) , am i right?
What definition of moment are you using?
 
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pongo38 said:
What definition of moment are you using?
Moment about point x
 
chetzread said:
Moment about point x
That is not a definition. see my reply to another of your questions
 
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pongo38 said:
That is not a definition. see my reply to another of your questions
i am using the first one (algebraic sum of the moments on ONE SIDE of the section.
 
pongo38 said:
That is not a definition. see my reply to another of your questions
how does this question related to the question that i asked in another thread?
 

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