How Do You Find Support Reactions in Structural Analysis?

AI Thread Summary
The discussion revolves around finding the support reactions Va, Vb, and Vc in a structural analysis problem. The user attempts to solve the equation VA + VB + VC = 25, derived from the downward forces of 10 and 5(3). However, they encounter an issue when substituting values for VA, VB, and VC, as the equation does not balance. The user is seeking clarification on their reasoning and the correct approach to equate upward and downward forces. Understanding the equilibrium of forces is crucial for accurately determining support reactions in structural analysis.
chetzread
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Homework Statement


I'm having problem of finding the support reactions of Va , Vb and Vc

Homework Equations

The Attempt at a Solution


My working is VA +VB +VC = 10+5(3)

VA +VB +VC = 25
But , when i sub in the value of VA , VB and VC , it doesn't satisfy the equation of VA +VB +VC = 10+5(3) , why I'm wrong ? [/B]
 

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Please explain your reasoning.
 
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Simon Bridge said:
Please explain your reasoning.
VA, vb and vc act upwards, while 10+5(3) act downward, upwards forces = downward forces
 

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