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The final kinetic energy equals the initial kinetic energy only in a collision that is:
ASticky
BElastic
CInelastic
DSticking
Answer & Solution
Correct answer: B. Elastic
1. Energy lost to deformation lowers the final kinetic energy.
2. Only one type loses none.
3. That is the elastic collision.
_Source: NCERT Class 11 Physics Part I, Chapter 6, Work, Energy and Power._
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