elephant wrote:Armand, I am also annoyed by the fact that scientists refuse to talk about centrifugal force, popular term.
This is because scientists speak as unambiguously as possible. A force is an interaction between 2 objects. Centrifugal "force" does not meet this definition.
It is only a fictitious force felt from a non-inertial frame of reference (ie at variable speed), as is gravity ("force" of gravity). We will therefore rather speak of centrifugal acceleration as we speak of acceleration of gravity (g).
If we turn, standing on a disc, our speed is not constant since it changes direction, so the acceleration which is the variation of the speed, is not zero. The acceleration, radial, to which we are subjected gives us the impression of a force, as we feel the same way our weight under the effect of gravity, it also an acceleration.
As for the centripetal force
http://fr.wikipedia.org/wiki/Force_centrip%C3%A8te and could be defined as "
force to prevent rotation of objects f ... camp "
There are therefore applied to a rotating body around an axis a centripetal force to compensate for
swerve centrifugal.
To keep the analogy with the acceleration of gravity, the reaction force of the ground which prevents us from falling lower is the equivalent of this centripetal force which prevents us from being ejected by centrifugal acceleration.