What is Gravity?

What is Gravity?

We all know what is Gravity – it is what keeps us down to Earth. It is the force that makes apple to fall next to the tree. But what is the definition of Gravity in physics?  It’s one of the fundamental interactions in the Universe. Fundamental interactions in physics are four completely different in nature interactions between elementary particles and bodies that they build. Many efforts in modern physics are focused at finding a common unified theory that would unite all interactions. So far, such a theory is not found. Here they are: Gravitational interaction Electromagnetic interaction Strong nuclear...