What causes a gravity force?

Answer 1

Gravity is one the four fundamental forces of the universe and is considered a force. It is what holds the planets in orbit as well as the very universe itself. It is what keeps us from floating off into space and plays a crucial role in almost every nature process from the ocean tides to the body's circulatory system. However what causes gravity? What is the mechanism that makes it work? Physicists have only partially answered this question. The first person to comprehensively describe it was Isaac newton.

Newton gave us the foundations of Physics, Classical Kinematics. Isaac Newton used the universal law of garvitaton to describe how gravity works. Thanks to him we now any two objects in the universe that have mass exert a gravitational pull on each other. The greater the mass and the closer the two objects are, the stronger the force of gravity. However this only described the phenomenon in party. It basically was a more detailed description than just something makes any object that is unsupported to fall to the ground. Newton took the next step in describing it with his Theory of Relativity.

Einstein hypothesized that space and time were one and the same and served as the fabric of the universe. He stated that gravity was simply a curvature in space-time created by a mass object pretty much in the same way a piece of cloth would be curved if it was stretched out and a heft object was placed on it. This curvature in space created by an object with greater mass than the objects surrounding it would cause these objects of lesser mass to fall toward the more massive object.