one question aboutAP Physics momentum

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Answers is D, but I don't understand. Why are linear momentum and angular momentum conserved but not kinetic energy? Can somebody give me a quick explanation? Thanks!

Apr 16th, 2015

Kinetic energy is not conserved because it may transform to other kinds of energy, e.g., potential energy or heat.

Apr 16th, 2015

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Apr 16th, 2015
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Apr 16th, 2015
Oct 23rd, 2017
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