# The Naked Scientists Forum

### Author Topic: Inertia - changing spacetime frames  (Read 2771 times)

#### Sandwalker

• Full Member
• Posts: 83
##### Inertia - changing spacetime frames
« on: 13/01/2006 17:19:17 »
Is inertia the force required to change an objects spacetime frame.

Does the graviton exist, think black hole/graviton paradox, or is gravity curved spacetime.

And the real strange one, is acceleration due to gravity the result of the object retaining the same spacetime frame in curved spacetime. Think principle of relativity, an observer isolated within the object would not experience any force being applied this would imply that his spacetime frame remains constant.

I could not join any group that would have me as a member!

#### Solvay_1927

• Sr. Member
• Posts: 383
##### Re: Inertia - changing spacetime frames
« Reply #1 on: 14/01/2006 02:17:42 »
quote:
Originally posted by Sandwalker

Is inertia the force required to change an objects spacetime frame.

Simon, could you clarify what aspect of the object's spacetime frame you think is changing?

#### Sandwalker

• Full Member
• Posts: 83
##### Re: Inertia - changing spacetime frames
« Reply #2 on: 14/01/2006 04:30:01 »
Its curvature, density, that part that dilates, warps.

Special case: smooth spacetime with zero curvature (think special relativity) an increase in speed (acceleration) of the object in smooth spacetime induces, for the object, a contraction of space, a slowing of time and an increase in mass.

General Case: Curved spacetime with space warping massive planets/suns nearby, the object, no longer in smooth spacetime, follows a path that keeps its relativistic spacetime flat in curved spacetime.

The accleration induces a relativistic spacetime curvature that negates, for the object, the curvature of spacetime.

The induced acceleration would be proportional to the curvature of spacetime.

God its late, let me sleep on it!

I could not join any group that would have me as a member!
« Last Edit: 14/01/2006 05:18:06 by Sandwalker »

#### Sandwalker

• Full Member
• Posts: 83
##### Re: Inertia - changing spacetime frames
« Reply #3 on: 14/01/2006 04:55:08 »
Another thought jumped into my head, in some way this is a combination of newtons 1st law and relativity, let its relativistic spacetime frame RSTF (Which is its motion, its spacetime frame and and the local curvature of spacetime) remain constant unless acted on by another force......

So this means gravity is not a force, relatively speaking, but the 'desire/inertia' of the object to remain in equilibrium with relativistic spacetime.

When observed from the perspective of a different RSTF it is perceived to be a force.

I could not join any group that would have me as a member!

Sorry about the late changes but I was tired! [:0]
« Last Edit: 15/01/2006 09:04:17 by Sandwalker »

#### The Naked Scientists Forum

##### Re: Inertia - changing spacetime frames
« Reply #3 on: 14/01/2006 04:55:08 »