Newton's Law of Gravitation - Derived From Scratch
A simple way to model the gravitational field of an object is to imagine a fixed number of "lines of force" that radiate from the object evenly into space.
Let's suppose the number of lines of force produced by an object is directly proportional to its mass, so..
where n is the number of lines of force produced by the mass m and k is a constant.
Now assume the density of the lines at any given point in space represents the strength of the gravitational field at that point. So at a distance r from the object the density of the lines of force is..
n/(surface area of a sphere of radius r) which is..
where G=k/4*pi is a constant.
This is Newton's famous law of gravitation. G is called the "universal gravitational constant". I think the more interesting thing here is the 1/(r^2) term.
I wonder if this simple method could be modified to give Einsteinian gravity, meaning the General Relativity model of gravity?
Content written and posted by Ken Abbott firstname.lastname@example.org