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Re: The actual running Archie paper...
--Original Message--From: Bill Adlam : Monday, May 10, 1999 11:54 AM
Subject: Re: The actual running Archie paper...
>John V Jackson replied to James Cunningham:
>> >They're using the mathematical description of work. No vertical
>> >vertical work. That doesn't mean no energy has been expended.
>> I was aware of that, though isn't it a "physic"-al description?
>> Since work is force times speed...
>Work is the amount of energy changed from one form to another (i.e.
>expended). It doesn't have a direction. When an object moves, work
>is equal to force times distance.
I'm a little disappointed you didn't realise I meant to say: power = force *
speed. I never said it had a direction.
Hey - to save you chaps a lot of time in trying to pick silly holes in my
arguments here, this is all "O" level physics, and I've got "S" level. It
may not be much but I do know the basics and you'll never disprove that!
Just to remind us of what this was all about, we are now agreed, I think,
that the Burgers & Chiappe paper were completely wrong in their suggestion
that thrust increased with speed. I tried to give you a handy illustration,
but I guess you didn't want to know.