IS GRAVITATIONAL FORCE FICTITIOUS IN REALTY ?

Mr.Albert Einstein, one of the brilliant minds of the world, published the general theory of relativity in 1915. He gave a very different approach to the idea of gravity.

The theory says that there is no such thing as gravitational force.

Yes, the theory really proposed it.

Then what causes this attraction?

Its the metric of the space around it. The change in metric causes the objects to fall towards the heavier object.

Here metric describes how an object moves in the space.

The analogy is the space-time wrap is assumed to be a stiff cloth and the mass as balls. Now if we place the heavier ball, the cloth bends down due to its mass. If we leave a lighter ball into the cloth, the ball starts to orbit around the heavier massed ball as shown in the image below.

  

So when you drop something it doesn't fall due to any force of attraction but due to its natural motion of accelerating downwards towards the centre of the curved space-time of the Earth.

This natural motion is called the Geodesic.

If something doesn't fall it is being accelerated away from the geodesic by something called real force.

To understand this let us assume that there is a book 

on the table. We observe that it doesn't fall towards the geodesic. It stays on the table without falling and this is due to the compression of the tabletop beneath it. And this is called the real force. And only is real force acting on the book. There is nothing like gravitational force acting on it.

Massive things are heavier because the table needs to apply a large amount of force to accelerate them away from the geodesic.

Gravity turns out to be fictitious like that of centrifugal force.

We feel gravity pulling us downwards but all that is really happening is the ground is pushing us upwards against our natural motion.

This theory is used in many of the practical application in our modern lives like Global Positioning Systems(GPS), working of electromagnets, nuclear power and sunlight, etc.

This is not the end of the story.

There are many things to be perceived and discovered. The cosmos is vast.

For further understanding visit :
http://hermes.ffn.ub.es/luisnavarro/nuevo_maletin/Einstein_GRelativity_1916.pdf

           

    Imagination is more important than knowledge.

       - Albert Einstein