# Gravity theory

#### rich78

It's quite a simple theory that attempts to explain gravity. Energy gradience is all it takes to cause gravity. If Earth moved closer to the sun, gravity would decrease and so Earth would expand. It's all a matter of how easily space consumes matter. Closer to the sun bodies have less gravity yet the same mass as the space is less void of energy.

What's strange is perceiving space as energy, it's not a material like gas but it acts like a material due to temperature. Everyone asks why does energy exist, my suggestions are - must the nature of space change? Is space an instruction?

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#### Classical Motion

What exactly is energy? What is energy? People use the term all the time. What exactly is it?

#### billslugg

"Energy" can be defined as "the potential to do work".

#### Classical Motion

And what is the required dynamic to do work?

#### Classical Motion

The required dynamic is displacement. Any and/or all motion is energy.

#### Classical Motion

Energy is the property of motion an entity has.

#### Classical Motion

It can be added or taken away. Motion is transferred.

#### Classical Motion

When motion is confined, the motion is expressed as inertia. And the more motion is confined, the more inertia is expressed.

#### rich78

What exactly is energy? What is energy? People use the term all the time. What exactly is it?
Energy in atoms is stored, so it's of capacity in atoms I guess. Energy in space is thermal and optical.

#### Questioner

Rattling off on my own tangent,

One has to establish what 'unchanging' is.
Inertia allows for movement that isn't considered a change of the 'base' state.
Is Inertia potential energy stored in motion/differentiable-animation?
Kinetic motion as potential energy?

Energy is the ability to change the base (deterministic?) state?
Stated that way includes the ability to extract potential energy from the base state.
Would antienergy (de-energizing?) be the appropriate term for actions/events producing/extracting potential energy from a system?

Does that mean there needs to be a potential energy term/equation/function along with (kinetic?) energy functions/equations?

In a closed system the total of energy & potential energy must remain constant.

#### billslugg

Yes, the total of energy and potential energy is conserved in a closed system.
Energy can be relative to the observer. A person riding on a bullet sees it as having no energy. The guy who gets hit sees it differently.

Energy is the ability to do work.
Work is force times distance.

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