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A collision in which the spring regains its shape without energy loss is:
AElastic
BInelastic
CExplosive
DPlastic
Answer & Solution
Correct answer: A. Elastic
1. The initial kinetic energy equals the final kinetic energy.
2. Nothing is lost to deformation.
3. Such a collision is called elastic.
_Source: NCERT Class 11 Physics Part I, Chapter 6, Work, Energy and Power._
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