What are the components of the reaction force at A for a truss bridge?

[NoobeAtPhysics]

Homework Statement

For the bridge shown in the diagram, find the components of the reaction force at A.

Homework Equations

sum of force = 0

The Attempt at a Solution

sum of force y = 0 = Ay+by-F=0

Moment at B = 0 =-Ay*4 +F*3

therefore Ay = 3F/4

and Ax =0 (roller)

 

[voko]

Correct.

 

[NoobeAtPhysics]

thanks, i put my solution in backwards online