Doug Dotson wrote:
"Jeff" wrote in message
...

I've been thinking about this - since I did give the guy a rough time - So
just how much acceleration is a "Panic Stop"? Did the mast have to be
"encased in concrete" as he said?


A Panic Stop is normally a deceleration.

Yes, of course, in common usage. But in physics acceleration is any
change in velocity (or momentum, if you want to be precise); the term
"deceleration" implies a particular reference frame.

....