If all the work done in deforming an object goes into deformation alone, that work is stored as:

1. Work is the process through which energy is transferred. 2. Where that energy ends up depends on what else happens during the deformation. 3. If the only result is deformation, and no work goes into thermal, sound or kinetic energy then all the work is initially stored in the deformed object as some form of potential energy. 4. In a toy dart gun with no friction, that potential energy is converted entirely into kinetic energy on release. 5. The named alternatives are exactly the losses the condition rules out. _Source: OpenStax College Physics for AP(R) Courses 2e (CC BY 4.0), Ch 16 'Oscillatory Motion and Waves', sections 16.1-16.11_