I'm so dizzy my head is spinning... I guess I just shoot from the hip (I've read at least three chapters from A Brief History of Time and I wanted to impress you).
<g> ----- Original Message ----- From: "Robert Everland" <[EMAIL PROTECTED]> To: "CF-Community" <[EMAIL PROTECTED]> Sent: Tuesday, September 10, 2002 1:42 PM Subject: RE: Hole in the Earth? > HAHAH you just answered that? That's funny, I cut and paste a whole webpage > where they answered it from some of Newton's laws. Man oh man Howie. *still > cracking up* > > Robert Everland III > Web Developer Extraordinaire > Dixon Ticonderoga Company > http://www.dixonusa.com > > -----Original Message----- > From: Howie Hamlin [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, September 10, 2002 1:30 PM > To: CF-Community > Subject: Re: Hole in the Earth? > > > ----- Original Message ----- > From: "Robert Everland" <[EMAIL PROTECTED]> > To: "CF-Community" <[EMAIL PROTECTED]> > Sent: Tuesday, September 10, 2002 1:19 PM > Subject: RE: Hole in the Earth? > > > > Gravity at the Earth's Center > > (Two questions with the same answer) > > (1) My students had a couple of questions that I thought were > > interesting. I told them I'd ask ya'll. > > > > What would you weigh is you were at the exact center of the earth? > > > > Essentially, it would be zero (neglecting the fact that the Earth is not a > perfect sphere and the forces of gravity from other celestial bodies). > > > What would you weigh is you were 3 meters from the center of the > > earth? > > Essentially zero. It would be the same as your wieght if you were on a > planet that had a radius of 3 meters. > > > Please include supporting evidence for your answers > > > > Evidence, I don't need no stinkin' evidence :-) > > It's basic laws of physics... > > > (2) > > > > I am confused about Newton's discussion of the force on a particle > > within a sphere in the Principia. In one place, he says that the force > > would be zero, since the attraction of all the particles in the sphere > > would cancel each other out. > > Yep, true. > > > Just a little further on, he says that the force would be directly > > proportional to the particle's distance from the center of the sphere. > > > > Also true. > > > Can you clarify these two seemingly conflicting statements? > > > > They are not conflicting. In the center of a spherical mass the effects of > gravity from the mass are cancelled out. If you venture from the center of > the mass then the gravity is related to the distance from the center. > > > Thank you for any light that you can shed. > > > > > > Regards, > > Howie > > > > ______________________________________________________________________ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
