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Mech - Girder Section - Picture included

  • Thread starter Chantry09
  • Start date
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1. Homework Statement

http://img132.imageshack.us/img132/8958/mechanicsgv3.jpg [Broken]

3. The Attempt at a Solution

(i) Is the weight balanced on both sides in a situation like this, in which case it would be:

(6000 +3000) / 2 = 4500N on A and 4500N on G
Or are the weights not equal and infact im meant to work it out with dimensions in terms of letters, for example A-C?

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(ii) Could anyone tell me where i can learn about these support structures, i brought a mechanics book but it doesnt cover and after looking on the internet i cant find any good sources of information to teach me.
 
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Answers and Replies

tiny-tim
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Or are the weights not equal and infact im meant to work it out with dimensions in terms of letters, for example A-C?
Hi Spadez! :smile:

No, they're not equal.

Hint: take a moment.
 
61
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Ok, so i take moments but i have to use the distance with respect to the letters, im not given any distances. Can i still do it like that?
 
tiny-tim
Science Advisor
Homework Helper
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hmm … assuming the triangles are all the same, just say "let AC = CE = EG = 1 unit" … the units will cancel in the end :smile:
 

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