Re: Science Project


podzol wrote:
> Gilby's right: centrifugal force is a measurable phenomenon equal and
> opposite to the centripetal force, that scientists use all the time
> (centrifuges are an example).



Ofcourse, I forgot to mention that every action has an equal and
opposite reaction, the marble is pulling as hard on the string as the
string is pulling on the marble. This does not mean there is
centrifugal force. If there is no centripetal force, or when the
'centrifugal' force is equal to the centripetal force, the marble will
go in a straight line. This is what happens in a centrifuge, a
centrifuge has holes in it, so at that spot, there is no centripetal
force. No centripetal force means the object (water in this case, or
uranium hexfloride gas in another) will be pushed outwards, and
continue moving in the direction of the
velocity vector. If there was such a thing as centrifugal force, the
object would be moving in the direction of the place vector.

If I'm wrong, I'd love to know how an object can turn, when the forces
acting upon it are equal, and thus the acceleration. You can test this
with a string, and a knot in the middle. Move it over the table,
pulling equally hard on each side of the string, now, pull harder on
one side then the other. Result is that the knot will deviate from it's
path. Ofcourse, this is lateral movement, not radial, but the same
principle applies.


P.S

I might have made a few mistakes in the scientific terms, but English
is my second language.


--
Erant

Live free, prosper, and under my rule.
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