Gravity is
rather a special force which is unusual which is different from many other
forces like electrical forces , etc.

And is
somewhere connected with geometric properties of space and time which has a
great impact to the brain of our great scientist Sir Albert Einstien.

Here, in
this post we gonna talk about the working of a great man on two historical
terms.Which was named as………

The
Newtonian Physics

(A introduction to general
theory of relativity)

Ok, now we
know the two terms Newton for which he is really famous for but I would like to
take a part of it and want to reavel the real concepts and story behind the origination
of a historical formula

F=G m R

_{1}m_{2 / }^{2}^{}

well you wanna more about NEWTON (click on this)

THE STORY
BEGINS..............

The
cellestial bodies like moon the earth, the subject of great intrest for every
one of those scientists related to astronomy.

"I am
proud to be an indian". why????

Because,
the famous indian astronomer Arayabhatt studied these motions in great
detail.Which he compiled in his book in Arayabhatt. He compiled in his book in
circular motions pf every celestial body.

Then about
after 1000 years. the brilliant combination of Tycho brahe and Johnan Kepler
brought their formulation of three law of planetery motion

* 1st law
(law of orbit)-

According to this all the planets revolve
on an celestial path with a fixed focus placed on sun.

*2nd law (law of area)

According to this law all the planets
revolve around the sun covers an equal area with respect to the radius vector

therefore it implies a case that is
......

A

_{1}=A_{2}=A_{3}
*3rd law (law of periods)

the square of the time period of a planet
is propotional to the cube of the semimajor axis of the eclipse.

that was all a base for the next section of the story......

The year 1965 was one of the best part in
the life of Newton and I would like to give title to that year

"THE
FRUITFUL YEAR"

the yeaar made him think about focusing
his attention towards the motion of the moon about the earth.

now let see what he thought.

Yes, it was all about the acceleration of
the body around us.

The first question of newotn's mind
ask......

what is the
force that produces this

acceleration?

He came with a natural guess that
actually earth is attracting the moon

now,the existing fact about newton-

that newton was sitting under an apple
tree when an apple fell down from the tree on the earth .That sparked the idea
that earth is attracting the apple down .

Have, you noticed that both the
incidents are related to the study of accleration.

Newton come upon with some daring
assumption which proved to be turning points in science and philosphy for every
upcoming minds.

Let's see what happened next-

The acceleration of a body falling by the
earth is equal to 9.8m/s

__distance of the moon from the earth__

distance of the apple
from the earth

^{ }

well guys lets have some conclusion form
this.

the acceleration is inveresely
propotional of the square of the distance between them

a=1/r

^{2}
and we know F=m.a

so we can say,

F=m/r

^{2}
And it is atated in thied law of motion
that,

the force
on the earth due to the

body
must be equal to the force

on the
earth due to the body

so, now here comes the revolotionary
fomula,

F=Mm/r

^{2}
or, F=Gm1m2/r

^{2}
the constant G is known as the universal
constant of gravitation and its value was formulated to be 6.67*10

^{-11}
that's finishes the real story behind the
mind game of NEWTON.