Calculating Tension and Reaction Forces in an Overhead Garage Door System

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Homework Help Overview

The discussion revolves around calculating tension and reaction forces in an overhead garage door system, specifically focusing on a uniform rectangular panel supported by cables and rollers. The problem involves determining the tension in a cable and the reaction forces at various points of support.

Discussion Character

  • Exploratory, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • Participants discuss calculating moments around specific points and applying equilibrium conditions to find unknown forces. There is uncertainty about the initial approach and whether it is valid.

Discussion Status

The discussion is ongoing, with some participants expressing uncertainty about their methods and seeking clarification. There is no explicit consensus on the approach, but attempts to analyze the problem using moments and equilibrium are noted.

Contextual Notes

Participants may be working under constraints related to homework guidelines, which could limit the type of assistance they can receive. The original poster has also provided a link to an image for reference, which may not be clear.

Jaspworld
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A 70 kg overhead garage door consists of a uniform rectangular panel AC, 2100 mm high, supported by the cable AE attached at the middle of the upper edge of the door and by two sets of frictionless rollers A and B. Each set consists of 2 rollers located on either side of door. The rollers A are free to move in horizontal channels, while the rollers B are guided by vertical channels. If the door is held in the position for which BD =1050 mm, determine
a.) Tension in cable AE
b.) Reaction at each of the four channels

(For an image go to http://www.freewebsite.0nyx.com/images/garage.bmp Sorry for the crappy image. I made it in paint and by the way, that G is supposed to be W.)
 
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Any thoughts...?
 
I'm not too sure but..

I think I can calculate the moment around point B and then get the value for A. Then I can let Fx=0 and Fy=0 and get the rest of the answers.

Does this make sense?
 
Help

How come my thread ended up on the third page! I still need help..
 

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