Explain the energy transformation which occur during elastic deformation. 

• When external force is applied to an elastic material, it deforms, and the work done is stored as elastic potential energy or on molecular level; the atoms and molecules within the material are displaced from their equilibrium positions. The potential energy is stored in the form of elastic bonds between these molecules when external force is applied.
• For small deformations, the relationship between the force and the deformation follows Hooke’s Law, where the force is proportional to the displacement.
• As long as the deformation is within the elastic limit of the material, the energy is stored without causing permanent changes to the material’s structure.
• When external force is released, the stored elastic potential energy is released, and the material returns to its initial state/shape.

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