Originally Posted By: finiter
The above explanation is based on the physical definition of force.

But you haven't given us a physical definition of force. What you say doesn't mean anything without a definition of terms.

And backing up a bit you say that in an orbiting body the force doesn't change the speed. But it does change the velocity. Speed is a scalar quantity. That is it has only magnitude. Velocity is a vector quantity, it includes a magnitude and a direction. An orbiting body is always changing the direction in which it is moving. The energy of a moving body is (1/2)*m*v^2. Therefore the acceleration is still F = MA. I know you don't like math in your system, but until you develop a way to do it some other way that is what we are stuck with.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.