|Lets say that a person was spinning around and
around in a circle, as a consequence the
centripetal force applied gives him/her the
effect of gravity and weight, but could that
person counteract that effect by being in a
hollow hight-mass sphere, will those effects be
balanced out in the center of the hight-mass
sphere, does it depend on the size, ect... of the
You're mixing up your directions. Say a person
is spinning in a cylinder.The centripetal force
is the push on his back of the wall of the
cylinder which keeps him moving in a circle,
instead of flying off on a straight line. Try
twirling a rock around on a string, and then let
go (make sure no one is near by to get hit!). See
- it will fly off in a straight line. The string
provided the centripetal force to keep it
spinning, until you let go. This is the viewpoint
of the INERTIAL observer - someone who is
on the outside, that is in this case, you,
watching the rock on the string.
Now, CentriFUGAL force is what you
FEEL when you are inside the cylinder, and you
feel like you are being pushed out.
Centrifugal force is not a"real" force in the
sense that you only feel it when you are on
aNONinertial platform, like the spinning
cylinder, or a car that is accelerating around a
curve. When you go around a curve in a car, and
you feel pushed sideways - that is centrifugal
force. It is your body's natural reaction to
the centripetal force, which always points in
towards the center of the circle.
So - the spinning cylinder creating
artificial gravity: the artificial gravity
will point outward. You will walk on the walls,
but you will"think" the walls are the floor.
Suppose you create a spinning space station
spinning at a rate such that the rooms on the
outside perimeter are maintained at 1g. The closer
to the center you get, the less artificial gravity
you have. So, put your zero-g testing lab at
the very center!
I'm not sure what you mean by a "hight-mass
sphere. "What you're describing is basically being
in orbit, where gravity is providing the
centripetal force (or acceleration).
Check out the Wikipedia web page for
gravitational time dilation:
which has these three cases (orbit, hollow
sphere, solid sphere). You can't cancel the
forces; they all add up, and time always goes
slower for you.
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