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

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The discussion focuses on determining the components of the reaction force at point A for a truss bridge. The key equations used include the sum of vertical forces equating to zero and the moment at point B. The solution reveals that the vertical reaction force Ay is calculated as 3F/4, while the horizontal reaction force Ax is zero due to the roller support. The participant acknowledges a mistake in submitting their solution online. Understanding these components is essential for analyzing truss bridge stability and load distribution.
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Homework Statement



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

joints2.41.gif


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)
 
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Correct.
 
thanks, i put my solution in backwards online
 
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