Two pucks collide and the kinetic energy of the pair is the same before and after. This is:
AElastic
BPlastic
CErratic
DChaotic
Answer & Solution
Correct answer: A. Elastic
1. Kinetic energy of the system did not drop.
2. That is the special case where it is kept.
3. The collision is elastic.
_Source: OpenStax University Physics Volume 1, Chapter 9, Linear Momentum and Collisions._
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