Question

We use the distance of the axis and the particles, and in that we apply parallel axis theorem. The distance in the parallel axis theorem is multiplied by_______

(a) Area

(b) Volume

(c) Linear distance

(d) Area/Volume

The question was posed to me during an interview for a job.

My question is based upon Mass Moment of Inertia topic in division Moments of Inertia of Engineering Mechanics

Answer 1

Correct choice is (a) Area

The best I can explain: Parallel axis for any area is used to add the two mutually perpendicular moment of inertias for areas. It gives a moment of inertia perpendicular to the surface of the body. And uses the square of the distance from the axis of rotation multiplied by the area.