Did I make a mistake in my balance force equations for homework?

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Homework Help Overview

The discussion revolves around calculating base reaction forces in a physics problem involving balance equations. The parameters include distances, a force, and an angle, with participants attempting to derive equations based on these values.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants share their attempts at creating balance equations and express concerns about the realism of their results. Questions arise regarding the correctness of their equations and whether mistakes have been made in their calculations.

Discussion Status

The discussion is ongoing, with some participants indicating they believe they have identified mistakes in their reasoning. There is a suggestion to mark the thread as solved, but no explicit consensus has been reached regarding the correctness of the approaches taken.

Contextual Notes

Participants are working within the constraints of a homework assignment, which may limit the information they can provide or the methods they can use. The nature of the problem suggests that assumptions about the system may be under scrutiny.

rihitz
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Homework Statement


IMG_20160929_152147.jpg

Given:
a=10m
l=18m
P=18kN
angle alpha = 35 deg

The task is to calculate the base reaction forces on A and on B

Homework Equations

The Attempt at a Solution


IMG_20160929_152431.jpg

This is my attempt on creating the balance equation system.[/B]
When replacing the variables with numbers, and trying to solve the equations, I get , in my opinion , unrealistic answers.

Is there any mistake this far?
 
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rihitz said:

Homework Statement


View attachment 106648
Given:
a=10m
l=18m
P=18kN
angle alpha = 35 deg

The task is to calculate the base reaction forces on A and on B

Homework Equations

The Attempt at a Solution


View attachment 106649
This is my attempt on creating the balance equation system.[/B]
When replacing the variables with numbers, and trying to solve the equations, I get , in my opinion , unrealistic answers.

Is there any mistake this far?
No.
 
Chestermiller said:
No.
IMG_20160929_154916.jpg
So this is correct as well?

I guess I found my mistake.
 
rihitz said:
View attachment 106651 So this is correct as well?

I guess I found my mistake.
Maybe you want to mark the thread Solved.
 

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