Re: Radius of Gyration The question was not what it meant. The question was on the origin of the term. It's pointless. The English language is full examples where it is fruitless trying to explain why something is called what it's called. For me it was enough to really UNDERSTAND what it meant in contrast to merely knowing how to define or calculate it. Yes everyone knows that its calculated by taking the squre root of the result of dividing the Moment of Inertia by the area of the section. I used to UNDERSTAND radius of gyration as a measure that tells me how far AWAY from the center of gravity of the section the material is distributed or scattered. I would keep reminding myself that the solid circular section would have a small radius of gyration while a tube of the same cross sectional area would have a very large radius of gyration. I could instinctively feel that the more the radius of gyration, the less the chances of buckling. Coming to the question of why its called radius of gyration, I suppose there may be no really satisfactory answer. I found this an opportune moment to dig out some amusing stuff from my collection and present it here. Some of you may have read this before but I hope you will enjoy reading this again. I don't remember where I got it from or who wrote it orginally. But it was fun to read then, fun to read again now and even greater fun to share it with all of you. Regards Vish Bangalore, India ================ Let's face it -- English is a crazy language. There is no egg in eggplant nor ham in hamburger; neither apple nor pine in pineapple. English muffins weren't invented in England or French fries in France. Sweetmeats are candies while sweetbreads, which aren't sweet, are meat. We take English for granted. But if we explore its paradoxes, we find that quicksand can work slowly, boxing rings are square and a guinea pig is neither from Guinea nor is it a pig. And why is it that writers write but fingers don't fing, grocers don't grocer and hammers don't ham? If the plural of tooth is teeth, why isn't the plural of booth beeth? One goose, 2 geese. So one moose, 2 meese? One index, 2 indices? Doesn't it seem crazy that you can make amends but not one amend, that you comb through annals of history but not a single annal? If you have a bunch of odds and ends and get rid of all but one of them, what do you call it? If teachers taught, why didn't preacher praught? If a vegetarian eats vegetables, what does a humanitarian eat? If you wrote a letter, perhaps you bote your tongue? In what language do people recite at a play and play at a recital? Ship by truck and send cargo by ship? Have noses that run and feet that smell? Park on driveways and drive on parkways? How can a slim chance and a fat chance be the same, while a wise man and wise guy are opposites? How can overlook and oversee be opposites, while quite a lot and quite a few are alike? How can the weather be hot as hell one day and cold as hell another. Have you noticed that we talk about certain things only when they are absent? Have you ever seen a horseful carriage or a strapful gown? Met a sung hero or experienced requited love? Have you ever run into someone who was combobulated, gruntled, ruly or peccable? And where are all those people who ARE spring chickens or who would ACTUALLY hurt a fly? You have to marvel at the unique lunacy of a language in which your house can burn up as it burns down, in which you fill in a form by filling it out and in which an alarm clock goes off by going on. English was invented by people, not computers, and it reflects the creativity of the human race (which, of course, isn't a race at all). That is why, when the stars are out, they are visible, but when the lights are out, they are invisible. And why, when I wind up my watch, I start it, but when I wind up this essay, I end it. ========== |