<Dd> R g 2 = I A (\ displaystyle R_ (\ mathrm (g)) ^ (2) = (\ frac (I) (A))) </Dd> <Dl> <Dd> R g = I A (\ displaystyle R_ (\ mathrm (g)) = (\ sqrt (\ frac (I) (A)))) </Dd> </Dl> <Dd> R g = I A (\ displaystyle R_ (\ mathrm (g)) = (\ sqrt (\ frac (I) (A)))) </Dd> <P> Where I is the second moment of area and A is the total cross-sectional area . </P>

The radius of gyration of a rigid body depends on