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sourabh_patel13
Oct 18, 2007, 11:07 PM
Why earth has gravity

Clough
Oct 18, 2007, 11:29 PM
If you look down at the bottom of this page, you will find links to questions that have been similar to yours. You might want to try clicking on some of the and see what information is there.l

Capuchin
Oct 18, 2007, 11:42 PM
All mass has gravity, the Earth, the Sun, you, your PC, all have mass and all have a gravitational field and all attract one another.

It's an intrinsic property of matter.

Of course, it's incredibly weak which is why you're not pulled towards your PC. It's so weak that it might be hard for you to believe me that everything is attracted towards each other.

Have a look at Cavendish's experiment, performed 200 years ago: Cavendish experiment - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Cavendish_experiment)

It's a notoriously innaccurate experiment but he managed to show that some huge steel balls attracted each other gravitationally.

Mahima
Oct 30, 2007, 10:13 AM
The earth has gravity because of the molten iron in its core... the molten metals produe magnetic field and you get gravity!

ballengerb1
Oct 30, 2007, 10:54 AM
Mahima, the magnetic field produced by the core doesn't produce gravity. However the mass of the earths core does increase its gravity. If there was less mass there would be less gravitational pull.