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In message <34CBEB4D.B0BB2005@novagate.com> Sargent Schutt writes:
> When there is no velocity, there is no
> acceleration. Acceleration can be zero while velocity is constant, but if
> velocity = 0, acceleration = 0; acceleration is nothing more than the rate
> of change in velocity. At TDC velocity is zero, and therefore acceleration
> is zero, too. Yet the engine is most definitely running.
No - almost completely wrong.
And, if velocity is constant, acceleration _MUST_ be zero.
Think again of the bungee jumper - his BDC (zero velocity) is the moment of
_maximum_ acceleration. The rope exerts its greatest force when it is fully
stretched (Hook's Law).
Committee Member, UK Audi [ur-]quattro Owners Club