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Groups > sci.physics.relativity > #582055
| From | Odd Bodkin <bodkinodd@gmail.com> |
|---|---|
| Newsgroups | sci.physics.relativity |
| Subject | Re: A science question about the trajectory of light |
| Date | 2022-04-06 16:17 +0000 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <t2keff$ree$1@gioia.aioe.org> (permalink) |
| References | (14 earlier) <t2dg1t$ien$1@gioia.aioe.org> <fdc40f96-402c-4387-b3cb-f59ea96231f5n@googlegroups.com> <262f5886-0290-405a-b529-7dcfacd8d1f9n@googlegroups.com> <t2k5m0$5bi$1@gioia.aioe.org> <jb5rhhFlpamU1@mid.individual.net> |
whodat <whodaat@void.nowgre.com> wrote: > On 4/6/2022 8:47 AM, Odd Bodkin wrote: >> RichD <r_delaney2001@yahoo.com> wrote: >>> On April 4, RichD wrote: >>>>>>>> A bicyclist will dust a runner on foot, whether a peak speed >>>>>>>> sprint, or long distance. Explain this, at the Physics 101 level. >>>>>>>> Why is a bike faster than Nike? >>>> >>>> That's a common try: "the gearing acts like a speed amplifier, >>>> it gives the cyclist an edge." It's fatally flawed. A gear train and >>>> large wheel may be a speed amp, but it isn't a power amp. THAT is the key. >>>> So, the biker and runner are identical twins, same metabolism. At any >>>> given speed, they face the same air resistance. >>>> To maintain constant speed, each must burn as required to overcome the loss >>>> at that speed. Their burn rate, when they race, is identical. >>>> The bike goes faster because it's more efficient, duh. It suffers lower loss, >>>> the runner suffers greater loss. Where exactly is the runner's handicap? >>> >>> And the solution is ..... <drum roll> ... every time the runner's front foot >>> hits the pavement, it STOPS DEAD! It's a colossal kinetic energy waste. >>> Then as he pushes off, he has to recover that energy. The cyclist suffers >>> nothing comparable. >> >> I’m not sure I buy that. >> >> The wheel patch that comes into contact with the road, also has to meet the >> road relatively at rest also, and this is no different than the foot. Good >> runners are already pulling back on that foot with the hamstring even while >> the foot is in front of the runner’s center of mass. > > > https://en.wikipedia.org/wiki/Zeno%27s_paradoxes > > Could you elaborate on the relevance you see? > > >>> To make it clearer, picture two sprinters, side by side, one on >>> roller skates. What happens when the skater's front foot lands? >>> It couldn't be clearer. >>> >>> An interesting question arises - why can no one answer this question? >>> My guess is, walking and running is so deep in our bones, we're numb >>> to the stop/start aspect of the activity, it's invisible. >>> >> >> >> > > -- Odd Bodkin -- maker of fine toys, tools, tables
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Re: A science question about the trajectory of light Tom Roberts <tjroberts137@sbcglobal.net> - 2022-04-01 10:46 -0500
Re: A science question about the trajectory of light Maciej Wozniak <maluwozniak@gmail.com> - 2022-04-01 09:22 -0700
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-01 14:56 -0700
Re: A science question about the trajectory of light Paul Alsing <pnalsing@gmail.com> - 2022-04-01 17:01 -0700
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-02 13:36 +0000
Re: A science question about the trajectory of light Maciej Wozniak <maluwozniak@gmail.com> - 2022-04-02 09:10 -0700
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-02 12:45 -0700
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-03 12:58 +0000
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-03 16:53 -0700
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-04 01:01 +0000
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-04 14:47 -0700
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-05 17:09 +0000
Re: A science question about the trajectory of light nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-05 21:02 +0200
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-05 19:32 -0700
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-06 13:47 +0000
Re: A science question about the trajectory of light nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-06 17:48 +0200
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-06 15:14 -0700
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-06 22:26 +0000
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-06 20:12 -0700
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-07 13:21 +0000
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-07 14:28 -0700
Re: A science question about the trajectory of light nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-07 16:21 +0200
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-07 14:56 -0700
Re: A science question about the trajectory of light whodat <whodaat@void.nowgre.com> - 2022-04-06 10:56 -0500
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-06 16:17 +0000
Re: A science question about the trajectory of light whodat <whodaat@void.nowgre.com> - 2022-04-06 22:10 -0500
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-07 13:21 +0000
Runner vs. bicyclist Tom Roberts <tjroberts137@sbcglobal.net> - 2022-04-03 23:50 -0500
Re: A science question about the trajectory of light nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-03 16:38 +0200
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-04 15:02 -0700
Re: A science question about the trajectory of light nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-05 10:28 +0200
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-05 19:49 -0700
Re: A science question about the trajectory of light nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-06 15:24 +0200
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-02 12:42 -0700
Re: A science question about the trajectory of light Odd Bodkin <bodkinodd@gmail.com> - 2022-04-02 00:18 +0000
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-02 12:43 -0700
Re: A science question about the trajectory of light Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-04-01 18:55 -0700
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-02 12:48 -0700
Re: A science question about the trajectory of light Michael Moroney <moroney@world.std.spaamtrap.com> - 2022-04-02 00:30 -0400
Re: A science question about the trajectory of light Cash Abel <caa@ntcpip.jp> - 2022-04-02 06:37 +0000
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-02 12:46 -0700
Re: A science question about the trajectory of light "Paul B. Andersen" <paul.b.andersen@paulba.no> - 2022-04-02 09:44 +0200
Re: A science question about the trajectory of light RichD <r_delaney2001@yahoo.com> - 2022-04-02 13:03 -0700
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