John, That's easy. When you're moving at constant velocity, your acceleration is zero. On Sun, April 10, 2011 6:46 pm, John Neth wrote: > You are showing your age and a problem with US science. Newtons and m/s/s. > > In physics there is the math and the conceptual of what is happening. Concept. How > do you have an acceleration of 0 m/s/s.?