Quote:
Originally Posted by aerohead
1) The rolling resistance power requirement is increasing arithmetically (linearly ) with road velocity.
2) While the aerodynamic power requirement is increasing geometrically, as a cube function of the road / air velocity.
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I prefer to look at it as energy per mile instead of power, because with power you have to divide it by the speed to figure out the energy.
In other words, the energy per mile needed to overcome rolling resistance doesn't change (much) with speed.
But with aerodynamic drag it increases with the square of velocity.