Name: Nick Passmore
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Question:
Is there a formula for artificial gravity?

Replies:
The only "artificial gravity" I am aware of is that due to the centripetal
acceleration of rotation = v^2 / r = w^2 * r where r = radius,
v = velocity, w = angular velocity.

So, if your space station had a radius
of, say, 100 m (pretty big), then it would have to rotate at
w = sqrt(g / r )
to give the same acceleration as gravity at the Earth's surface
(g = 9.8 m/sec^2 ):
w = sqrt( 9.8 m/sec^2 / 100 m ) = 0.32 rad/sec = 0.05 rev/sec
or 3 revolutions per minute.
( 1 rad (radian) = 1 revolution (circle) / 2*PI rad/circle )

Incidentally, one of the scenarios for the Mission to Mars has the manned
spacecraft attached to an auxiliary mass with a tether, the whole system
rotating about the center of mass, giving the marstronauts some artificial
gravity on their long trip to Mars.

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