Is there proof gravity can not be a energy source?

[Low-Q]

The purpose of this post is to discuss weather or not there is proof gravity can not be used as a energy source.

It is prooven without doubt that gravity alone cannot be used as a energy source.

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[Omnibus]

The earth spins, things on the earth are held on earth by gravity.
Without the work gravity does on things on earth, things on earth would fly off in a tangent.

Gravity doesn't do work on things that stand still on earth. Gravity doesn't do work on an apple standing still on a table.

[Omnibus]

Gravity alone cannot be an energy source not because it has been proven without a doubt that it cannot do so. Nothing like this needs to be proven at all. Simply, gravity isn't energy. Period.

[brian334]

Post your proof. Lets chat about it.

[Low-Q]

The earth spins, things on the earth are held on earth by gravity.
Without the work gravity does on things on earth, things on earth would fly off in a tangent.

Work are done ONLY if a gravitional force are able to move an object into another potential energy level.
Work are also ONLY done if an object has changed its position in line with the gravitional field. Moving an object from A to B, angular to a gravitional field, does in sum not require work because the altitude are not changed. What work we spent to accelerate the object are taken back when deaccelerating it into a stop at point B.

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