# more fuel efficiency = more deaths?

**URL:** <https://boards.straightdope.com/t/more-fuel-efficiency-more-deaths/73166>\
**Category:** Factual Questions\
**Created:** [July 20, 2001, 9:14am UTC](https://boards.straightdope.com/t/more-fuel-efficiency-more-deaths/73166 "2001-07-20T09:14:30Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![JS\_Princeton](https://avatars.discourse-cdn.com/v4/letter/j/57b2e6/32.png) [@JS\_Princeton](https://boards.straightdope.com/u/JS_Princeton)\
**Post date:** [July 22, 2001, 2:09am UTC](https://boards.straightdope.com/t/more-fuel-efficiency-more-deaths/73166/21 "2001-07-22T02:09:57Z")

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Just to let all you know… mass times velocity sqaured is NOT energy!

1/2 mass times velocity squared is energy.

Hate to nitpick, but when you’re off by a common factor of two, you’re off by a common factor of two.

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