# Do all the objects in the universe exert force on all other objects?

Do all the objects in the universe exert force on all other objects? Like a type of gravity; also, how much does it decrease as it gets farther away?

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Curious about your thinking behind the wording "like a type of gravity". Are you seeking a force with infinite reach other than gravity? –  BobStein-VisiBone Sep 24 at 23:51
@BobStein-VisiBone Maybe magnetism? –  Timtech Sep 24 at 23:52
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## 2 Answers

Yes - this is the formula:

$$F = G\frac{m1 * m2}{r^2}$$

Using this equation, we can say that all atoms in the universe exert force upon eachother. One carbon-12 atom has a mass of $1.660538921(73)\times10^{-27} kg$. That's a crazy small mass.

Now let's say that these two atoms are 100,000,000 light years apart. That's $9.461\times10^{23} m$, which is a very long distance.

Now, if we plug these values into our equation, we get that the force is: $1.709191430132 \times 10^{-59} N$

That's a very, very small amount of force. But it's still force.

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So do I emit a gravitational force? –  Timtech Sep 24 at 23:53
@Timtech Yes - every atom (that we know of) does. –  Undo Sep 24 at 23:54
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All objects in the universe exert a gravitational force on all others - the farther away an object is, the smaller is the force it exerts. (The force is inversely proportional to square of the distance from the object, so an object twice as far away means only 1/4 the amount of force). Furthermore, the more massive the object, the greater the force it will exert on other objects - twice the mass means twice the force. So nearby, massive objects, dominate the gravitational force on other objects.

Source: Frequently Asked Questions About General Astronomy, Compiled by Dr. John Simonetti of the Department of Physics at Virginia Tech.

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Again added quotation markup for the quoted parts, AND added directly extracted from quote source. Please do that on your own from now on, I don't think anyone had a copy/paste in mind when they signed for this new website. Quoting with attribution is fine, but you have to understand the subject that is being discussed to properly answer any questions or possible follow ups in the comments. Since this is a self-answer, my point can be easily challenged because the question explicitly asks for what is in the quoted answer, but please don't do that, it reflects badly on a yet to launch site. –  TildalWave Sep 26 at 23:26
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