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5 cards from this section. Quick, good the night before a test.
Define stress and provide its formula.
Think about how force is distributed across a surface.
What does strain measure in a material?
Relate it to the change in length.
What is the formula for stress?
Remember the relationship of force and area.
The strain is dimensionless.
Think about how strain is calculated.
A copper rod 4 m long, with an area of 15 mm², is subjected to a load of 30,000 N. Calculate its elongation given that the Young's modulus for copper is 120 GPa.
Remember to convert all units consistently.
Discuss how material properties influence elongation under varying loads. Provide at least two examples.
Consider how stiffness affects elongation based on Hooke's Law.
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