Lu, I agree with SRR99 fully. He has stated clearly all I would have said anyway. Force is derived from acceleration of some mass, F= ma, as stated by Newton.
You were a tech rep (read: salesman) with the rocket maker? You would have more credibility if you were the rocket scientist. I bet you did not major in mechanical engineering or applied maths. You knowledge of mechanics were too primitive.
(edited for typos)
[This message has been edited by Old Dog (edited 08 November 2000).]