Re: Bicycle physics question

On 6/21/2024 4:54 PM, Roger Merriman wrote:

Tom Kunich <cyclintom@yahoo.com> wrote:

On Fri Jun 21 05:16:11 2024 zen cycle  wrote:

On 6/20/2024 6:26 PM, AMuzi wrote:

On 6/20/2024 4:48 PM, Tom Kunich wrote:

On Thu Jun 20 14:40:19 2024 Frank Krygowski wrote:

On 6/20/2024 11:27 AM, AMuzi wrote:

On 6/20/2024 10:17 AM, Frank Krygowski wrote:

>
If a cyclist were to repeatedly stand tall on the pedals, then crouch
as low as possible, then stand back up, he would not experience
accelerations and decelerations each time he did that.
>
That case is easier to explain. The relevant vectors are perpendicular
to each other.
>

>
Speaking of different aspects, a full upright stand on a descent and
then folding into an aero position makes for a dramatic speed change.

>
Of course. But that's entirely explained by aerodynamics. It's not
related to changes in the rider's potential energy relative to the road
surface.
>
-- - Frank Krygowski
>

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When you are riding a bike you are gaining and losing energy via the
motion of the CG of the bike in the depth of the gravity field. You
are also losing more energy in a turn from tire forces. Because the
depth of the gravity field is so deep and the change of the CG change
of the bike is so slight you can only talk about the gains and loses
theoretically. The loses from the tire shape into and out of a turn
are more significant. But under normal conditions those are so slight
that only racers can detect them because of the speed required to make
signficant scrubbing actions detectable.
>
With a motorcycle it is easier to detect because of the much larger
speed differentials and the much wider tires with consequen5tial
inccrease in scrubbing energy.

>
Gravity field?
Is that like a corn field or more of a force field?

>
no, the gravity field is what causes the tire sealant to stay at the
bottom of the tire when the bike is moving, causes dents to pop out of
bike tubes while riding the bike and renders aluminum oxide flammable.
Different laws of physics in tommyworld, dontchaknow....

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Why do you continue to show that you haven't even a passing understanding
of physics. Toyota is about to release a motor that runs on WATER. It
separates the hydrogen fromn the oxygen and then recombines them for
energy. I realize that with your very elementary understanding of physics
that you will say that isn't possible but perhaps you can address that to
Toyota, I won't even try to explain how you can get aluminum oxide to
burn and create energy since you can't even explain how a wire length
could be measure with a PWM signal.
>
Your absolute ignirance is breaqqthtaking considering that you have a job
as an engineer. Good thing that it isn't any more complex than signing
off on the QC of a batch of devices.
>

 

>

 You need to read the press releases their “water engine” is a electric
motor powered by a fuel cell ie they are still going down the Hydrogen
route which has been the bright future for well over a hundred years, now
see also the year of the Linux desktop or gearbox bikes!
 Roger Merriman
 

Well, probably possible in that throwing piles of money at problems can make them disappear like magic.
People who work with hydrogen tell me it's a bitch to contain- seeps through everything; a container suitable to most compressed gases will still bleed hydrogen...
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971