4.2.1.2 - Equilibrium Equations
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Practice Questions
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What is the sum of vertical forces in a static truss?
💡 Hint: Think about forces acting up versus acting down.
Define static determinacy.
💡 Hint: How many equations do we use?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the equation ∑F_x = 0 represent in truss analysis?
💡 Hint: Think about which forces are acting in the horizontal direction.
A truss is statically indeterminate if:
💡 Hint: Review the conditions for determinate vs. indeterminate.
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Challenge Problems
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A truss has 8 members, 4 joints, and 3 reactions. Is it stable? Justify your answer using the appropriate relationship.
💡 Hint: Apply the m + R < 2j condition.
In a truss analysis, if the internal force in a member returns negative, what does it imply? Provide an example.
💡 Hint: Think back to the sign convention!
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