The radius of gyration is related to the moment of the body. So the calculation of the moment of the body due to the loadings involve a quantity called :
Answer & explanation
Correct answer: option 4
The calculation of the moment of the body due to the loadings involve a quantity called a moment of inertia. This is having much significance in the various fields in the engineering sector. The main types are the ‘I’ section structures which are being much used.