Question

The sum of the products of the area of its elements and the squares of the perpendicular distances of the centres of gravity of these elements from the axis is called ___________

(a) centrifugal force

(b) moment of inertia of areas

(c) centripetal force

(d) centre of gravity

Answer 1

Right answer is (b) moment of inertia of areas

The explanation: It is a measure of an object’s resistance to changes to its rotation.

•Also defined as the capacity of a cross-section to resist bending.

•It must be specified with respect to a chosen axis of rotation.

•It is usually quantified in m4 or kgm^2.