Forces & Elasticity (AQA GCSE Physics): Flashcards

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Force and extension
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Elastic distortion

Stretching that occurs when force is applied to a spring

Relationship between force & extension in springs

Direct (proportional) relationship

Hooke's law formula

F=keF = ke

What does spring constant (kk) tell you?

How stiff the spring is

Formula for extension

Total stretched length - original length

Formula for elastic potential energy in spring

Es=12ke2E_s = \frac{1}{2}ke^2

Formula to calculate spring constant

k=Fek = \frac{F}{e}

Straight line on force-extension graph shows

Spring following Hooke's law

Gradient of force-extension graph gives

Spring constant

Area under force-extension graph gives

Energy stored in the spring

What happens beyond limit of proportionality?

Spring stops following Hooke's law

Units for force in Hooke's law

Newtons (N)

Units for extension in Hooke's law

Metres (m)

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