Hi I can understand how once an object is falling in converts PE to KE. My question is how does it move in the first place. I know if we assume a gravitaional force that is fine. However from the perspective of energy it seems if an object starts with no KE it can not lose PE by moving into an area of lower potential as it cannot have any velocity to enable the move. If no PE is lost how can there be a gain in KE. If there is no gain in KE how can it accelerate. Again I can clearly see that once the object is moving it is losing PE which converts to KE and it is accelerating. But from energy principles how can it start to move. Where does the KE come from to move into a lower gravitational potential.