Saturday, September 22, 2012

Centrifugal force = gravity?


Let me be the parrot. It is 100% equivalent to a force, in this case, centrifugal. That is the basis of general relativity.

In relativity, being on a source of gravity(say, the earth) causes your time to be slower than someone orbiting above the earth(ignoring speed). Being in a centrifuge will cause your clock to slow down by the same amount as the gravity it would take to give the same force.

As for the wording "does it create gravity". The answer has been provided by Shaula, and it is no. However, does feeling weight from spin give the same effect as gravity? Yes it does. Again, like Shaula pointed out.

The idea that these two things are 100% equivalent kind of modifies the question a bit. Are they really two separate things? Supposedly not. On a more technical level, gravity is caused by energy, not mass. Mass has energy. But a centrifuge seen spinning has more energy than a stationary one. In that sense, it does create an incredibly tiny amount of additional gravity for people trying to weigh it. However, this is nitty gritty stuff and doesn't directly address the question, which itself becomes unclear.

edit: If this is confusing, ignore it. The wording leaves much to be desired.

Source: http://cosmoquest.org/forum/showthread.php/138294-Centrifugal-force-gravity

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