Timeline for What braking strategy is most fuel-efficient?
Current License: CC BY-SA 2.5
5 events
| when toggle format | what | by | license | comment | |
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| Jul 26, 2010 at 14:32 | vote | accept | David Spivak | ||
| Jul 26, 2010 at 11:50 | comment | added | JBL | Thanks for the comment! I've corrected the typos, and I agree with the rest of your comment. | |
| Jul 26, 2010 at 11:47 | history | edited | JBL | CC BY-SA 2.5 |
added 235 characters in body
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| Jul 26, 2010 at 11:40 | comment | added | Willie Wong | Two points: (a) a pedantic one. First sentence in third paragraph, "expcted" should be "expected" and "red" should be "hopefully turning green" (b) a more natural/physical assumption (not the one OP asks, though) is not to maximize the expected speed at which you pass through the light, but to minimize the energy loss due to braking. So you need to fix $\int_0^T vdt = d$, $v(0) = v_0$ and function $v$ non-increasing while maximizing $\int_0^Tv^2dt$, then the optimum is sudden brake when you hit the red light. (Hence my earlier [deleted] comment about acceleration constraint.) | |
| Jul 26, 2010 at 1:41 | history | answered | JBL | CC BY-SA 2.5 |