> On www.midclyth.supanet.com read the article entitled, > "The laws of physics." (Appears under "The universe" > heading on the home page.) It was written today, > following our discussions on this forum. I haven't had time to look at this properly but on my first reading it appears that you have treated momentum as a scalar value when rearranging it with energy and ignored the fact that velocity is a vector. Regards, Mike.