Alevel Physics/Forces and Motion/Deformation of solids
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Hooke's law[edit]
This applies to an object's deformation only before the elastic limit; from then on it deforms plastically and no longer follows this law. it states that,extention is directly propotional to the applied force.
Spring Constant[edit]
The gradient refers to the gradient of a TensionExtension graph.
The standard units of k are N m^{1}
Strain[edit]
Because this is a division of two measurements of length, Strain has no units and remains a ratio.
Stress[edit]
The units for Stress are N m^{2}, otherwise known as Pascals (Pa)
The Young's modulus[edit]
Strain energy[edit]
However, due to Hooke's Law, it can be calculated in another form;
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