- #1

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]=90

^{o}, (b) [tex]\alpha[/tex]=45

^{o}

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

M

_{c}=-(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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