4 ms·
That's incorrect. Power consumption is proportional to drag * speed, and drag is speed^2, so power is speed^3, and energy per mile is speed^2.
by tlb 6y ago
That's incorrect. Power consumption is proportional to drag * speed, and drag is speed^2, so power is speed^3, and energy per mile is speed^2.
- deleted 6y ago[deleted]
- D_Alex 6y agoOr: Work = Force * Distance, so the energy spent per mile will be proportional to drag force, which is proportional to speed^2. Either way, its 21% increase in energy consumed per mile in this case.
- carlob 6y agoTrue but we're interested in power consumption per distance traveled so it goes back to O(v^2).
- sokoloff 6y agoThat’s precisely what the last clause you’re responding to says. You’re agreeing but couching it as a “but”.
- btilly 6y agoAh, shoot. You are right. Energy is force times distance, momentum is force times time. I was thinking about force times time. wipes egg off of face