Quote: Originally Posted by dhk2
alfeng, this one takes the cake. I've know for a while now that you have no understanding of math or physics, and you've again demonstrated it in spades. From basic algebra, you should have learned that in algebraic formulas, letters are defined to mean whatever you want them to mean. If alienator's equations had used K for power, or a greek letter, they would be equally valid, as long as he defines what they mean. Sure, for the universal concepts as he displayed above, there are conventional letters used, and that's what is used.
Besides, I can assure you that I've taken a physics course or two, and it's not known to me at all the P stands for Momentum. Not sure where you came up with that one. Besides, do really you think Alienator hasn't taken a HS or freshman Physics course....and passed it?
What he clipped out is nothing more than the definition of work, written differential-equation form. If the P (power) is constant, then the work performed (in joules) is just the product of the power (watts, or joules/second) times the interval in seconds from t (0) to t (1). EG, if I ride at a steady 100 joules/sec (watts) power for 3600 seconds (1 hr), I'll have done 360,000 joules of work, or as usually written, 360 kj. You should really try to understand this much.
There is no need to feel inferior or defensive just because you didn't have to master this stuff in school or in your work. Lots of people don't understand math and physics, and that doesn't mean they are inferior or without talent. I have a sister who is a professional classical musician with a fine career and loads of intelligence, but if I asked her to define "Work", see would no more be able to recite back "Force times Distance" than I could sit in front of the orchestra and play a piano concerto.
A very interesting post ...
How long have you harbored these thoughts?!?
Really, while I am mildly embarrassed for not remembering 'p' (lower case
) is the correct abbreviation for "Momentum" I do not believe that I been "defensive" in regard to this topic ...
BTW. I now take it that YOU, too, cannot fathom Chris Juden's matrix ...
- maybe, both you & alienator can put your minds together to figure it out
FYI. Apparently, 'p' (lower case as pointed out alienator
) has indeed been used to represent "Momentum" for Centuries
vs. MY MISTAKEN remembrance that 'P' (Upper Case
) was the abbreviation for "Momentum" ...
Close, but no cigar!
But, I seem to recall that you didn't believe that "dwell" was a valid concept (word choice?
) for the phenomenon which I declared was the reason for the dodgy shifting which Shimano shifters experienced when downshifting while the drivetrain was under a load (e.g., going uphill
) even though the www.parktool.com
site uses that term, too ...
- WTF?!? Where did they get it?
[*] No, I do not think they got it from me or from my use of the term "dwell" in this Forum (but, who knows?
) nor do I recall getting it from them ...
- someone whom I cannot give attribution to used the term "dwell" before I did
My recollection is that you claimed that the only time YOU experienced a problem with your Dura Ace shifters
was when you were fatigued ... but, THAT was-and-is the point!
It is very difficult to execute mis-shifts with Campagnolo shifters regardless of the circumstances ...
For anyone who may think that the preceding discourse on "dwell" is OT, it is not.
The above discourse is intended to illustrate that any belief that I am fabricating labels which suit my fancy for accepted concepts is an error.
- that is, regardless of the rider's skill-or-lack-of, Campagnolo shifters are not handicapped by the "dwell" which has been engineered into Shimano's shifters which can result in dodgy shifting and, it is the ease with which Camapgnolo shifters engage the Cog or Chainring EVEN WHEN mated to non-Campagnolo components that make them superior
- that's not just an opinion but also a fact which can be easily reproduced by ANYONE plug-and-play (vs. a utilizing a "Rube Goldberg" configuration) is the operative, contemporary phrase that can be applied to incorporating Campagnolo shifters with an otherwise Shimano drivetrain
- of course, some people's aesthetic sensibilities are too adversely affected to mix-and-match components THAT's certainly the success of marketing!