Power required to overcome a drag force is proportional to the *cubed* velocity ... | Hacker News

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		javiramos on Nov 11, 2019 \| parent \| context \| favorite \| on: Cutting the speed of ships has benefits for humans... Power required to overcome a drag force is proportional to the cubed velocity (drag force is proportional to the squared power). So twice the speed equals 8 times the relative power. Nevertheless, it makes your point even stronger.

esotericn on Nov 11, 2019 [–]

Your factor of two is removed by the fact that the power is applied for half the time.

A car travelling 70mph gets to its' destination twice as quickly as a car travelling 35mph.

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