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From: Frank Krygowski <frkrygow@sbcglobal.net>
Newsgroups: rec.bicycles.tech
Subject: Re: RE: Re: RE: Re: RE: Re: Petential Energy doing Work
Date: Mon, 1 Jul 2024 14:15:52 -0400
Organization: A noiseless patient Spider
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On 7/1/2024 11:50 AM, Tom Kunich wrote:
> On Sun Jun 30 20:16:25 2024 Frank Krygowski  wrote:
>> On 6/30/2024 7:14 PM, Tom Kunich wrote:
>>>   Frank claims to have taught mechanical engineering and he doesm't even know how to quantify potential energy which is a MAJOR component of engineering. He says tipping your bike over according to me would cause it to shoot out from under you!
>>
>> No, Tom, you've got that precisely backwards. I said tipping a bike into
>> a turn would not, as you claim, generate an increase in kinetic energy.
>> Nor would there be an increase in kinetic energy precisely canceled by
>> tire friction.
>>
>> I'm ignoring the rest of your verbose rant. Damn, you spew so much misery!
>>
> Sorry Krygowski, you showed that you do not believe in addition or subtraction of potential energy and you supposedly were and engineer. 

Tom, I used and taught conservation of energy principles many times. I 
had students do experiments on those principles. You're simply 
misapplying the concept.

> I NEVER said that the addition of potential energy was "exactly" canceled by tire friction but that is the way your mind works - ...

I don't have time to dig out your precise words; but you did claim an 
increase in kinetic energy when a cyclist leans in a turn. You also said 
something about tire friction scrubbing away some of that energy, 
apparently to explain why a cyclists doesn't see an increase in speed. 
Perhaps you didn't use the word "exactly"?

> You clearly stated that if you stand in a parking lot and tip your bike over that it would shoot out from under you ...

Nope, I said essentially the opposite. I suggested you try standing tall 
during a track stand, for maximum potential energy, then dropping to the 
saddle. I noted that the reduction in PE does _not_ generate an increase 
in Kinetic Energy in that case. There's no mechanism for it to do so.

Sorry you found that confusing; but I'm not surprised.

-- 
- Frank Krygowski