Physics – 1.5.1 Effects of forces | e-Consult
1.5.1 Effects of forces (1 questions)
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a) In the region labelled 'A', the material is undergoing elastic deformation. The extension is directly proportional to the applied load, and the material will return to its original shape when the load is removed.
b) The point labelled 'B' represents the limit of proportionality. It is the point where the slope of the load-extension curve is constant, and the material is behaving elastically.
c) If the load is increased beyond point 'B', the material will undergo plastic deformation. This means that the material will not fully return to its original shape when the load is removed, and it will exhibit permanent deformation. The load-extension curve will no longer be a straight line.