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Statics problem - is the mistake mine or the solution manual?

  • #1
Femme_physics
Gold Member
2,547
1
So I got everything right other than Rd (the end). I personally think there's a mistake in the solution manual.

Homework Statement



Basically these are all pin joints, even the "hydrolic cylinder" (CD) is weightless and connected by pin joints, so the fact it's called or drawn as "hydrolic cylinder" doesn't matter.
F = 80 [kN]
Ignore the weight of all the beams

http://img198.imageshack.us/img198/3063/sketch1999.jpg [Broken]


The Attempt at a Solution



Attached
 

Attachments

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Answers and Replies

  • #2
I like Serena
Homework Helper
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I can't fault your solution.
I give it my stamp of approval. :)

What's the answer of the solution manual?
 
  • #3
Femme_physics
Gold Member
2,547
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w00t! Another mistake to add to my blog :)

Thanks for the stamp!

Answer manual's Rd = 226.27 [kN]

Solution manual full solution attached
 

Attachments

  • #4
I like Serena
Homework Helper
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w00t! Another mistake to add to my blog :)

Thanks for the stamp!

Answer manual's Rd = 226.27 [kN]

Solution manual full solution attached
Yes, there's indeed a mistake in the solution manual.
They took the force at E in the wrong direction.
They really should have drawn proper free body diagrams as you did! :)
 
  • #5
Femme_physics
Gold Member
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*pats self on shoulder*

Thank you Serena! :)
 
  • #6
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i also believe your work is correct. and it is very clear and easy to follow; nice job.

cheers
 
  • #7
Femme_physics
Gold Member
2,547
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Thank you eczeno! :)
 

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