Question

Define radius of gyration. Is it a constant quantity?(2mark)

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Answer 1

Radius of gyration is defined as the distance from the axis of rotation to a point where the total mass of the body is supposed to be concentrated, so that the moment of inertia about the axis may remain the same

Answer 2

Answer:

• The term Radius of Gyration is basically the measure of the stability of the elasticity of a cross-section area against the applied buckling.
• It is not a constant quantity as it is the measure of a distance and hence, it can be expressed in meter.

Explanation:

Radius of Gyration of a cross section area, denoted usually by r or ρ, is a distance which basically measures the cross section’s resistance to the buckling when being compressed.

It is the distance between the centre of the object to where the object's whole mass is located. Hence, it is not a constant quantity.