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tacet777
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Homework Statement
A T-shaped bracket supports a 150-N load as shown. Determine the reactions at A and C when (a) [tex]\alpha[/tex]=90o, (b) [tex]\alpha[/tex]=45o
ans: (a)A=150N going down, C=167.7N,63.4degrees (b)A= 194.5N going down; C=253N, 77.9degrees
base on the book.
http://www.glowfoto.com/static_image/23-165339L/2124/jpg/07/2010/img6/glowfoto
[URL]http://www.glowfoto.com/static_image/23-165339L/2124/jpg/07/2010/img6/glowfoto[/URL]
Homework Equations
[tex]\Sigma[/tex]Fx=0 ;right +
[tex]\Sigma[/tex]Fy=0 ;up +
[tex]\Sigma[/tex]M=0 ;clockwise +
The Attempt at a Solution
[tex]\Sigma[/tex]Fx=-Ax+Cx+Bx
-Asin([tex]\alpha[/tex])+Cx+Bsin([tex]\alpha[/tex])=0
[tex]\Sigma[/tex]Fy=Ay+Cy-By
Acos([tex]\alpha[/tex])+Cy-Bcos([tex]\alpha[/tex])=0
Mc=-(30)Asin([tex]\alpha[/tex])-(15)Acos([tex]\alpha[/tex])+(30)Bsin([tex]\alpha[/tex])+(25)Bcos([tex]\alpha[/tex])
substituting the [tex]\alpha[/tex]=90degrees
A=150N (but i don't know how to check weather it is going down or up since i got it in the moment equation)
using A=150
Cx=0
Cy=0Thank you guyz...
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