Jump to content
  • Advertisement

Archived

This topic is now archived and is closed to further replies.

Tree Penguin

Gravity and distance?

This topic is 5280 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hi, i have a question but due my n00bness it might look a little stupid or something, anyway here it is: I was wondering how the strength of gravity (maybe not gravity, i mean the force planets and stars excersize at eachother, please tell me if that''s not gravity ) decreases when distance increaces, is it linearly or exponentially or something else (i expect that). Can anyone give me the basic formula or equation? Thanks in advance! Ow, and if i said something stupid please tell me so i can learn . And also i was wondering if anyone knows an article (or a serie of articles) about the atom structure (i know the molecule basics already from secondary school, maybe not enough but i will figure things out as i read), just interested. I don''t mind a difficult to understand article, i will figure it out (i got the time, the discipline and the will ).

Share this post


Link to post
Share on other sites
Advertisement
One of newtons laws :

F =G mM/R^2

G gravitational constance, m & M mass of bodies, and R is the distance seperating them.

G is something like 6.6x10^8, cant quite remember....

Share this post


Link to post
Share on other sites
I would just like to note that the force of gravity is proportional to 1/R^2 only outside of the mass of the object. Inside it's proportional to R (assuming a pretty even density distribution). So the graph of the force of gravity looks something like this:


gravity
| /| / \_
| / \
| / \__
| / \____
| / \____________
|/_______________________________\________________-radius
0 |
radius object

(you're going to have to assume that the second part of that graph is smooth and roughly resembles 1/R^2 :)


EDIT ok the graph doesn't want to turn out right but you get the idea.

[edited by - uber_n00b on June 3, 2004 2:34:35 PM]

Share this post


Link to post
Share on other sites
Imagine you would dig a hole right through the earth. Now If you were to drop through that hole, gravity would get less and less, until at the center of the earth, you have no gravity. why? because if you were to calculate gravity separately for every single atom in the earth once you start falling ''into'' the earth some of them would actually be pulling away from the center of gravity, effectively decreasing the force of gravity.

The center of gravity of an object is basically just a summed value of all its parts. Once you are inside this object, things get more complicated though.

Share this post


Link to post
Share on other sites

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!