Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
At 04:52 PM 11/19/2003, Matt Jusinski, you wrote:
[J Denker]
In my book, there is such a thing as scalar
acceleration
which means an increase in speed (|v|).
If the scalar acceleration is zero locally, and the
speed is locally zero, Why does a projectile fall back
down?
It seems to me that scalar acceleration is not much
help in explaining most common phenomenon.
Matt Jusinski Morris Hills Regional District
Yes, Matt is using a short-hand, but still, a nit-pick.
To abstract the thought:
"If a [math construct] is zero, why does a physical
effect happen?"
...Because, the models of schoolmasters do not control
reality. One can hope they illuminate aspects of reality,
is all - and accept their sphere of influence - never
universal.