What is radius of gyration and how is it applied in practice?

[chandran]

what is radius of gyration? How this is practically applied ? Any application example website?

 

[arildno]

Given an object of mass m and arbitrary shape, its radius of gyration with respect to a fixed axis is the number $$r_{g}$$ so that the moment of inertia "I" of that object with respect to that axis can be written:
$$I=mr_{g}^{2}$$
Assuming you've got a way to measure applied torque and angular acceleration, the object's radius of gyration can be determined experimentally.

 

[chandran]

any application in practical?

 

[haynewp]

Columns, it is the determining factor for Euler buckling.