Path: ccsf.homeunix.org!ccsf.homeunix.org!news1.wakwak.com!nf1.xephion.ne.jp!onion.ish.org!gcd.org!news.yamada.gr.jp!newsfeed.media.kyoto-u.ac.jp!nntp.gol.com!203.216.70.8.MISMATCH!not-for-mail From: Ron Hitler Barrassi Newsgroups: fj.life.in-japan Subject: Re: Gifu Date: Wed, 23 Feb 2005 12:10:48 +0900 Organization: FusionGOL - Global Online Japan Lines: 158 Message-ID: References: <1112u2n8u7lleb2@corp.supernews.com> <84ler39g5dl3$.1874oruux44k1$.dlg@40tude.net> <1lt3119gk47qt7l0mj5k8bqeei70q3hl1t@4ax.com> <37nhjtF5h1p83U1@individual.net> <37su73F5fof1eU2@individual.net> <37sv9qF5fof1eU3@individual.net> <37t59sF5fof1eU4@individual.net> <37tandF59j9rtU1@individual.net> <37u021F5jh7qiU1@individual.net> <37vivgF5k0ae8U1@individual.net> <37vslrF5k0ae8U8@individual.net> <381um0F5h3h5fU2@individual.net> <3826c5F5imndhU1@individual.net> NNTP-Posting-Host: 203-216-000-090.engineering.gol.ad.jp Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Trace: nnrp.gol.com 1109128248 22354 203.216.0.90 (23 Feb 2005 03:10:48 GMT) X-Complaints-To: abuse@gol.com NNTP-Posting-Date: Wed, 23 Feb 2005 03:10:48 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20041007 Debian/1.7.3-5 X-Accept-Language: en, ja In-Reply-To: <3826c5F5imndhU1@individual.net> Xref: ccsf.homeunix.org fj.life.in-japan:25692 Kevin Gowen wrote: > Ron Hitler Barrassi wrote: > >> >> >> Kevin Gowen wrote: >> >>> Ron Hitler Barrassi wrote: >>> >>>> >>>> >>>> Ron Hitler Barrassi wrote: >>>> >>>>>>> If that is the case, why did you suggest using a spring based >>>>>>> device to measure the downward force >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> Because I have heard of Hooke's Law. >>>>>> >>>>> >>>>> But not the gravitional constant apparently. >>>>> >>>>> >>>>>>> when the correct way to measure force is it's effect on moving >>>>>>> *a* body of mass? >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> It's "effect"? I don't even know what that is supposed to mean. >>>>>> Who says that a mass acted upon by a force must be in motion? Push >>>>>> against a building as hard as you can. The building does not move, >>>>>> but you are still exerting a force upon it. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> F=ma >>>>> >>>>> (I've highlighted the definite article to draw attention to your >>>>> misreading) >>>>> >>>> >>>> >>>> I didn't elaborate on this point. You cannot use a spring to measure >>>> a force. >>> >>> >>> >>> >>> Really? Don't tell Hooke. >>> >>>> It can only be used to measure weight (NB deliberate use of >>>> "weight", not "mass" not "force", but "weight". >>> >>> >>> >>> >>> Weight is a force. >> >> >> >> Weight is a scalar. Force is a vector. > > > Weight, being a force and having magnitude and direction, is a vector. and weight is measured in kilograms. Game. Set. Match. Thank you. Must be tough for you playing against someone who is thinking several moves ahead. Oh and when I jump out the building to test the bathroom scales as you suggested how much do I weigh? > >> You don't weigh in the direction of anything. > > > In this planet, your weight is a force vector in the direction of the > earth's center of mass. This is why you place a scale beneath you rather > than on top of your head. > >> As you are in Florida your weight is in a different direction to mine? >> (I'll let you off this one) > > > Yes. > >>>> A spring, like your tug of war rope, requires a force at both ends >>>> to expand, or contract. >>> >>> >>> >>> >>> Yes. In the case of a bathroom scale that measures weight with a >>> spring, the person standing on the scale provides *the* force at one >>> end. The floor beneath the scale provides the force at the other end. >>> >> >> You missed the definite article again. > > > You called "a" the definite article again. 'the' is the definite article? > >> If a force act on a spring the spring will accelerate off in the >> direction of the force. We would lose a lot of springs that way. > > > A force need not result in motion. Compress a spring between your thumb > and a finger. Force is acting on the spring, Forces are acting on the spring. From 2 directions, one from my finger and the other from my thumb. Two digits, two forces. (The opposite of your Not "a force", two forces. Equal and opposite, Newton's 3rd is satisfied. I can't compress a spring with one finger, sort of like one hand clapping. Really this is too easy. Take a break, Kevin. > but strangely, it does not > go accelerating off into infinity. > > You also may wish to drive an automobile into a brick wall at a high > velocity. You will exert a force on the wall, but it will not move. > >> Newton's 3rd I believe. > > > I only wish you would believe it. > Newton's 3rd does not invent forces. >> So it is measuring two forces? More magic forces appearing from nowhere. > > > This is just too funny. actually, it's quite sad.