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Physics 13 Online
OpenStudy (anonymous):

Which of the following best describes a completely elastic collision? The kinetic energy (K) of the system before the collision equals K after. The potential energy (U) of the system before the collision equals U after. The kinetic energy (K) of the system before the collision is greater than K after. The kinetic energy (K) of the system before the collision is less than K after.

OpenStudy (irishboy123):

A

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