firewall
What is gravational force? Is that every object with certain number of mass will have gravational force?
you might be able to easily light your cigi's there. no need to bring your butane lighter.yourdadonapogostick said:i see no advantage in going to the center of the earth when it comes to studying gravity.
it's different than wikipedia, too.edit: crap, this forum doesn't appear to have the same LaTeX system as http://scienceforums.net
wieghtlessness at the center of the earth? i don't think so. it obeys the INVERSE square law. that means, the shorter the distance, the less force. as the distance approaches zero, the force approaches infinity. [tex]\lim_{r\to0}\mathbb{F}_{grav}=\infty[/tex]rbj said:maybe we wouldn't need rides in the "vomit comet" to test out weightlessness if we could go to the center of the earth.
not inside the planet. you need to apply Gauss's Law and, assuming a constant density of mass, the strength of the gravitational field is directly proportional to r, the distance to the center.yourdadonapogostick said:wieghtlessness at the center of the earth? i don't think so. it obeys the INVERSE square law.
If you mean some kind of artificially high field without an increase in mass, no. Even a black hole still has only the total gravitational field of the original collapsed object, but it's extremely concentrated. If you could compress the Earth to black hole status, it would still keep the moon in orbit, but wouldn't start sucking Jupiter toward it.Thinktank said:Mmm..let me rewrite my first question...is this possible to create an object with a huge gravitation field
it's just like Gauss's Law for electrostatics when you make the corresponding substitutions. mathematically, Gauss's Law applies for any inverse-square field.yourdadonapogostick said:i wasn't aware that Guass's Law applied to gravity as well. what is it for the gravitational force?
No, it doesn't. They maintain a balanced relationship, along with all other objects. If the Earth's gravity was intense enough to pull Jupiter out of orbit, the moon, Mars, and Venus would already be in our laps.yourdadonapogostick said:the earth DOES suck Jupiter toward it. :<THORN>