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For a small deformation, what happens to an object's shape once the deforming force is removed, according to the source?
AThe object returns to its original shape, since the deformation is elastic
BThe object permanently keeps its new, deformed shape
CThe object shatters immediately once the force is removed
DThe object's shape keeps changing even after the force is gone
Answer & Solution
Correct answer: A. The object returns to its original shape, since the deformation is elastic
1. Two important characteristics apply to small deformations.
2. The first is that the object returns to its original shape when the force is removed, meaning the deformation is elastic for small deformations.
3. A permanent shape change or shattering describes what can eventually happen only for much larger, non elastic deformations.
4. Continued shape change after the force is removed would contradict the very idea of an elastic, reversible deformation.
_Source: OpenStax College Physics (CC BY 4.0), Ch 5 "Further Applications of Newton's Laws: Friction, Drag, and Elasticity", section 5.3 Elasticity: Stress and Strain_
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