Parallel Forces Acting on a Plane
Forces Acting on a Beam
Elastic behavior is the ability of a material to recover its original shape after the forces causing deformation have been removed. In I/GCSE physics curriculum, Hooke’s Law states that: load force is directly proportional to extension provided that it is within its elastic limit
Once the spring or whatever has been stretched beyond the elastic limit, it will change shape permanently and will not return to its original shape.
Helical springs and metal wires give you a graph like the upper one (except in metal wires, the graph is steeper). However, elastic bands do not obey Hooke’s Law and you get a graph like this (lower).
End of this topic!