User:Onthenet/Gravity

General Relitivity
General Relativity is concerned with gravity and the laws of physics relative to accelerated observers.

Acceleration
It is observed that ojects at rest stay at rest. That is there is no change in position.

Gravity
In the simplists terms, Gravity, is the tendency for objects to fall towards the earth. By defining a force as the cause of accelerated motion, it follows that Gravity can be described as a force, the force of Gravity.

Acceleration
It is observed that ojects at rest stay at rest. That is there is no change in position.

Inertial and Gravitational Mass
In the time Newton the motion of objects were examined. In particular, it was found to be useful to consider the second derivative with respect to time of position. This quantity is called acceleration, and is thought of as being attributed to a force. In this context because objects are observed to fall towards the earth with non zero acceleration, the tendency for objects to fall towards the earth to be described as a force, the force of Gravity.