4.1.2 - Basic Relations
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Practice Questions
Test your understanding with targeted questions
What is the formula for stress?
💡 Hint: Think about how much force is distributed over an area.
When tension is considered a positive force, what is compression?
💡 Hint: Remember the sign convention we discussed.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the formula for calculating stress in a truss member?
💡 Hint: Remember: stress is how much force is spread over an area.
True or False: Tension forces are considered negative in the sign convention.
💡 Hint: Think about our discussions on sign convention.
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Challenge Problems
Push your limits with advanced challenges
A truss member undergoes a total axial load of 1000 N and has a diameter of 10 cm. Calculate the stress in the member and must decide if it's safe based on a material strength of 150 N/cm².
💡 Hint: Apply the area formula first before finding the stress.
A truss structure is subjected to external forces that cause moment reactions of 50Nm at the supports. If he member lengths are known, determine whether the truss is statically determinate by applying the criteria you've learned.
💡 Hint: Refer back to the definitions of internal and external determinacy.
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