If the force of gravity performs work, what is its energy source?

Answer 1

The force of gravity preforms work by applying a force (weight) over a distance (the distance the object falls). Energy is required to do work. The energy required in order for gravity to do work on an object comes from the object's gravitational potential energy which it has inherently by virtue of being at some [non-infinite] distance away from another massive body.

How the object got to be at its given distance so as to obtain its gravitational potential energy is irrelevant as it only matters that it does have some potential energy which will be lost/converted as gravity does work. The object could have been placed there by someone lifting it up against gravity, or the obiject could have always been seperated all the way back from the point of the formation of the universe, it does not matter.

Answer 2

The work along any force gradient is conversion of potential into some other (often kinetic) energy.

Basically the energy that has to be put into the object to gain the potential by moving it against gravity (aka lifting).

Answer 3

4 basic forces in the universe. magnetism,gravity,strong force and weak force.Strong and weak force can only exist in the atomic and sub atomic level.magnetism and gravity are very related to each other,but manifest themselves in different ways.

Answer 4

hi. u seem to share my thoughts and feelings about time. i would like to contact u. if u r reluctant to give away ur address here contact me at [e-mail] with TIME in the subject line.

Answer 5

Gravitational potential energy which is spent once the two items are touching.

Edit: and will somebody fluent in calculus please answer my gravitational question? boohoo!

Answer 6

kinetic :)