Yes, unless the point of application of the force does not move with the
object there is no acceleration. If the point moves with force applied
enegy content has changed.

Cheers MC

Gerard Weatherby wrote:
On Thu, 24 Jul 2003 14:20:12 +1200, The_navigator© wrote:


So if a=0 f=0?


Depends, do you still believe "F=ma cannot be correct unless the object
applying/experiencing F also changes energy content!"


Cheers MC

Gerard Weatherby wrote:

On Thu, 24 Jul 2003 10:37:55 +1200, The_navigator© wrote:
Of course it still applies.



You tell me!



Technically, that depends on your reference frame. Let's consider the earth
stationary and the rock stationary. Therefore it is not accelerating. Does F=ma
still apply?



S/V Cat's Meow
http://www.catsmeow.org



S/V Cat's Meow
http://www.catsmeow.org

The Bernoulli Principle applies to  sails and is the
principal contributor to moving the hull through the water,
In the case of aircraft jet propulsion.. the jet engines
provide the main forward thrust with the Bernoulli Principle
making a secondary contribution to lift in the countour
contour of the wings.

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Spiritually at: Latitude 21 degrees 19' 9" North. _!_
Longtitude 157 degrees 56' 31" West. Aloha! ___o_(_)_o___
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