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Energy efficiency of active travel (walking, cycling, ebike) compared to an electric car
(slrpnk.net)
cross-posted from: https://slrpnk.net/post/7273195
this post was submitted on 04 Mar 2024
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It wouldn't change that much actually. Modern cars are really aerodynamic and the comparatively high weight of electric cars emphasizes the rolling resistance in relation to the air resistance.
This Wikipedia page (https://de.wikipedia.org/wiki/Fahrwiderstand) has an example where 77% of energy goes to air resistance, 23% to rolling resistance - At a speed of 200kmh. Which means rolling resistance requires 5x more energy to overcome than air resistance at 50kmh. (77% -> 77 energy units -> multiply by (50/200)^2 = 1/16, as air resistance depends on speed squared -> 5 energy units, but rolling resistance is independent of speed so it doesn't change (still 23 energy units))