Conrod force/acceleration

[quk@isham-research.demon.co.uk (Phil Payne)]

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).

-- 
 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club