I believe that you can have speed without power but you can’t have power without speed. If you have no momentum where is the power going to come from? Fa jing doesn’t come from nowhere and it eventually has to have an outlet.
You mean force = mass * acceleration?
Being “heavy handed” also needs to be factored into the equation… A larger bodied person moving at a slower rate of speed will have the same devastational impact as a smaller opponent moving at a higher rate of speed. Therefore, the larger opponent needs less distance to move to generate the same amount of force.
Unless the larger exponent of whom we speak is slow. 
When one stands between an elephant and a wall, a slight move from the elephant could squeeze him and it does not have to have speed. This is true but if that elephant was running the power would be that much more devastating. On the other hand if you take a 150 pound person and do the same test the person getting squeezed will not hurt that much. The bottom line is if you want to have power it has to generate from somewhere. A person can not just have power. Where does it come from? Punch someone slow and then punch someone fast using the exact same techique and generation of power you tell me which one will hurt more.
force = mass * acceleration
Equation is correct, but i think you shoud rather use p = m * v.
There was a thread about this a while back, do a search on “newtonian punching”.
Though, i think fajin is a bit difficult to express in terms of simple formulas… as is punching in general.
Fajing Article
We got permission to post our Fajing training article out of the JAMA and it is now available for your viewing.
If you click on the small pictures they will appear at the top, one at a time, as a regular picture.
You can see some of the two man training, da qiang, and xiao baji jia form broken.
I hope you all enjoy reading and exchanging ideas.
http://www.wutangcenter.com/wt/index.html
Its under Articles.
Of course this is just one of many ways you can training for effective expression of fajing. Alignment and relaxation (fa song) very critical but hard to develop.
Hi RAF,
Thanks for all the great material sharing. Also thank for the PM that you sent. I really appreciate it. The articles are wonderful. My laptop is dying on me. So I have snail speed in downloading anything (even the pictures.) I am getting a new laptop soon and hopefully will be able to enjoy all the video clips as well.
May you have a prosperous 2004.
Warm regards
Robert (Mantis108)
PS your email address doesn’t seem to be working.