Question

what is the cause for the earths gravitation.

Answer 1

Mass of earth

Answer 2

how @Krishnadas

Answer 3

Because mass is the cause of gravitational attraction

Answer 4

And there is this tiny tiny particle called gravitons..

Answer 5

I will give you a link.. http://www.livescience.com/1770-greatest-mysteries-gravity.html

Answer 6

i am confused.
like..... an electron has electric field because due to its charge. here charge is the cause for electron to have field. likewise what is the cause for eath to have gravitational field.

Answer 7

as you said above mass is the cause. but how it works. how mass could produce field.
i am also a part in earth mass. do you mean i am a cause for earths gravitation.

Answer 8

mass produces a field called gravitational field which is equal to "g" at surface. However ,i think concept of gravitational field in not very useful in classical mechanics. at least in what i have read so far. We would usually want to calculate information about orbits and stuff where energy and angular momentum are the 2 important parameters.

Answer 9

you said "mass produces a field called gravitational field"..

can you please elaborate above statement. i am confused.
how can mass produce field. ok then now my body has mass. do you mean my body is producing gravitational field.
@Diwakar

Answer 10

@radar

Answer 11

@shkrina

Answer 12

Sorry @M_Vamshi_Kumar_Reddy I not sure of the reason, I think Einstein was working on that and never finished. He was attempting to work out his unified field theory which would include gravity.

Answer 13

looking for better answer.

Answer 14

Think of a field as a sheet of graph paper that has values in each square. An electron is just an excitation of the electromagnetic field, a single square on the paper that has the value 1. If you put a one in the square beside that one, they will move apart. The fields exist through all space, just natures way of graphing energy.

Answer 15

Gravity works in reverse, we don't know how, Nobel Prize for you if you figure it out.

If you put two ones on the graph paper, they will move towards each other with a force of\[F = \frac{Gm_{1}m_{2}}{r^{2}}\]G is a measured constant, which shows how insanely weak gravity is at \[0.0000000000667\frac{Nm^{2}}{kg^{2}}\]m1 is the mass of one thing m2 of another, say Sun and Earth, or me and you.
r is the distance between them.

Let's ignore everything on the Earth, and you and I are 80kg each and 2km apart.\[F=\frac{(6.67\times10^{-11}\frac{Nm^{2}}{kg^{2}})(80kg)(80kg)}{(2\times10^{3}m)^{2}}\]

Answer 16

what is the cause for gravitational force ?. like the cause for an electron to produce field is charge.

Answer 17

@doc.brown