3 ms·
sure, but 90% of a car's energy goes towards fighting air resistance which doesn't change at all. (and ~20% of the ~10% energy penalty for accelerating gets ret
by adgjlsfhk1 3y ago
sure, but 90% of a car's energy goes towards fighting air resistance which doesn't change at all. (and ~20% of the ~10% energy penalty for accelerating gets returned when you brake)
- gnicholas 3y agoIs this true? I recall reading that a large portion (75%?) is due to air resistance at highway speeds, but this is obviously much much lower at low speeds. I would be surprised if driving around town (which is where PHEVs are probably used a good deal, and where there's lots of stop-and-go) resulted in 90% of the energy going to fighting air resistance.
- jacquesm 3y agoExactly. For highway driving mass isn't all that relevant (it is to road and tire wear, but not for acceleration, after all you really only accelerate once). But in city driving mass is very important and air resistance is hardly a factor.