Materials (AQA A-Level Physics): Quizzes

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Bulk properties of solids
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What is the definition of density?

Mass per unit volume

What does Hooke's Law state?

Extension is directly proportional to force

In the formula F=kΔLF = k \Delta L, what does kk represent?

Spring constant (stiffness)

What is the limit of proportionality?

Point where Hooke's Law no longer applies

What is the formula for tensile stress?

FA\frac{F}{A}

What is the formula for tensile strain?

ΔLL\frac{\Delta L}{L}

What is the formula for elastic strain energy?

12FΔL\frac{1}{2} F \Delta L

How do brittle materials behave on force-extension graphs?

Extend very little, fracture at low ext.

What happens to a material showing elastic behaviour when the force is removed?

Returns to original shape

What does a stress-strain graph indicate about a material?

Ultimate tensile stress (UTS)

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