Onlyme, You seem to make this mistake yourself...

You may remember on another thread we 'talked' about GR being a model/tool.

You really showed there you don't understand the geometrical space-time manifold idea and maximum ageing to give the worldline of a rock on such a manifold. You did that by using the word " freefall', and you think there is a force required to change momentum.

As I stated on that thread back then...For the purposes of using the geometrical manifold model you just take it that space-time is altered by mass and energy. The same for the force idea, you take it there is a force at work. Why does mass and energy alter space-time or what is the mechanism of how the force works at a distance.. don't need to know to make predictions because we are only using models built on observations.

My bold below shows your strong urge for a force.

You show here

* you think* there is a need to include a 'force' in to the geometrical space-time manifold model

You seem to have an urge to put one model 'force idea' into the geometrical space-time manifold idea/model.

You seem to forget these are models we are talking about. Freefall is used in the force model/idea.

Here's rpenner on force...

http://www.sciforums.com/threads/ne...he-speed-of-light.136920/page-11#post-3147077