A-level Physics/Forces and Motion/Deformation of solids
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, extension is directly proportional to the applied force.
Spring Constant edit
The gradient refers to the gradient of a Tension-Extension 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.
It can also be represented as
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, y=mx+c;
A reader requests expansion of this page to include more material. You can help by adding new material (learn how) or ask for assistance in the reading room. |
Elastic limit edit
the maximum extent to which a solid may be stretched without permanent alteration of size or shape.
Plastic limit edit
When the stress is sufficient to permanently deform the metal, it is called plastic deformation.