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firewall
What is gravational force? Is that every object with certain number of mass will have gravational force?
yourdadonapogostick said:i see no advantage in going to the center of the Earth when it comes to studying gravity.
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.
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
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>
If Jupiter and Earth both turned into black holes - but did not increase their mass, then there would be no difference in how they interacted with each other.Thinktank said:If both Earth and Jupiter become black holes, will the (jupiter) black hole suck the Earth (black hole)? Or both forces will pull each other and expand the space between them?
pallidin said:I would like to address the question with my limited physics knowledge(not to mention limited English grammar)
Anyway, I heard that you CAN increase the mass of an object by accelerating it.
Is that true?
rbj said:i suppose so. i think what you are asking about are the effects of special relativity. time, length (along the direction of motion), and mass all change as an object is accelerated to a velocity that is very fast (in the same order of magnitude as the speed of light). specifically, for mass,
[tex] m = \frac{m_0}{\sqrt{1 - v^2/c^2}} [/tex]
where m is the mass that a "stationary" observe measures of an object that is moving past him or her at a velocity of [itex] v [/itex] and [itex] m_0 [/itex] is the "rest mass" or the mass an observer who is moving along with the object observes.
r b-j
pallidin said:Ok, so is the mass increase dependent on a specific range of accelerative velocity? Or, is the mass increase an inherent nature of acceleration, regardless of how small the acceleration?
Gravitational force is a natural phenomenon that describes the attraction between two objects with mass. It is one of the four fundamental forces in the universe, along with electromagnetism, strong nuclear force, and weak nuclear force.
Gravitational force affects objects with mass by pulling them towards each other. The strength of this force depends on the mass of the objects and the distance between them. The greater the mass and the closer the distance, the stronger the gravitational force.
The equation for calculating gravitational force is F = G * (m1 * m2)/r^2, where F is the force, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them. This equation was first derived by Sir Isaac Newton and is known as the law of universal gravitation.
Gravitational force is responsible for the motion of objects in the universe. For example, it keeps planets in orbit around the sun and causes objects to fall towards the Earth. The force of gravity also affects the trajectory and speed of objects in motion.
Gravitational force cannot be shielded or cancelled. It is a fundamental force that exists between all objects with mass. However, its effects can be counteracted by other forces, such as electromagnetism, which is responsible for keeping objects from falling through solid surfaces.