Yes that aspect always frustrated me. But I think Newton's third law covers it: the force
of the pull is countered by the force of the object pushing back. No net force, no
acceleration. To actually get acceleration, you have to consider the whole system.


"Gerard Weatherby" wrote in message
...
On Wed, 23 Jul 2003 10:19:23 -0400, "Jeff Morris" jeffmo@NoSpam-sv-lokiDOTcom
wrote:

f the rock was truly stationary, there was no Force. Unless we want to get into
immovable objects and unstoppable forces.

So gravity stopped working?

S/V Cat's Meow
http://www.catsmeow.org