you know the force you feel on the string isn't technically centrifugal force, what you are feeling in the tension on the string. if you had a bucket filled with water, then the water would be experancing centrifugal force. The tension on the string is in responce to Newton's third law of motion. For every action their is an equal but opposite reaction.

Also forces are applications of energy, the only energy that is being imparted in the bucket on a string experiment is the energy from your arm, every thing else is a reaction to that imparted enery, therefore there is only one 'real' force.

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The universe is not only queerer than we imagine, it is queerer than we can imagine.
J. B. S. Haldane

<font size=-1>[ This Message was edited by: moving_target on 2002-07-26 23:48 ]</font>