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I have a formula which is G-force = velocity*omega/9.8. Omega is the angular velocity. I've seen on the internet that G force is actually acceleration/9.8. I'm confused as to which formula is correct. For simulating the motion of particle taking a turn, would omega simply be velocity divided by radius of turn? Assuming Cartesian coordinates.

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FWIW, there is now a physics SE... –  J. M. Nov 23 '10 at 4:50
    
Oh cool! Will ask there. Thanks :) –  Nav Nov 23 '10 at 5:40

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For circular motion, the two expressions are equivalent. Yes, in circular motion omega is velocity/radius. Acceleration in circular motion is velocity^2/radius.

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