# How can energy and momentum \*both\* be conserved?

**URL:** https://boards.straightdope.com/t/how-can-energy-and-momentum-both-be-conserved/962301
**Category:** Factual Questions
**Created:** [April 5, 2022, 11:27am UTC](https://boards.straightdope.com/t/how-can-energy-and-momentum-both-be-conserved/962301 "2022-04-05T11:27:52Z")
**Posts on this page:** 1
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### Author: ![Schnitte](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/schnitte/32/9033_2.png) [@Schnitte](https://boards.straightdope.com/u/Schnitte)
#### Post date: [April 11, 2022, 3:40pm UTC](https://boards.straightdope.com/t/how-can-energy-and-momentum-both-be-conserved/962301/16 "2022-04-11T15:40:55Z")

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> [@Chronos](#):
>
> And as @Andy_L alluded to, whenever the question is “Where did the energy go?”, the answer is almost always “heat”.

It wasn’t in [this previous thread](https://boards.straightdope.com/t/orbital-mechanics-and-the-conservation-of-energy/947579) (also started by myself), but this only as an aside.

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