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# Hooke&#039;s Law

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## Paul Sheffield

on 7 November 2018

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#### Transcript of Hooke&#039;s Law

Hooke's Law
L.O
Elastic and inelastic deformation
Work done stretching a spring

Starter
Write a conclusion to last lessons graph
trend, quote data, explain
how is it different to a fixed resistor at a constant temperature
Elastic potential energy
The work done stretching a spring
What is the equation for work done?
What is the equation for the area of a triangle?
Exam practice
Look at last lessons graph
Does the spring have the same amount of energy before and after it passes its elastic limit?
What has happened to this energy?
A force that stretches (or compresses) a spring does work and elastic potential energy is stored in the spring. Provided the spring does not go past the limit of proportionality the work done on the spring and the elastic potential energy stored are equal.
The amount of elastic potential energy stored in a stretched spring can be calculated using the equation:
Elastic potential energy =
0.5 x spring constant x
〖(extension)〗^2
[Ee = 1/2 k e^2]
Full transcript