Question

There is perpendicular axis theorem for the area, and it is can be used to determine the moment of inertia of an area about inclined axis.

(a) True

(b) False

This question was posed to me in an interview.

My doubt is from Moments of Inertia for an Area About Inclined Axis in section Moments of Inertia of Engineering Mechanics

Answer 1

Right answer is (b) False

The explanation is: There is no perpendicular axis theorem for the area. In spite there is the theorem as parallel axis for any area. Thus we have the theorem which is used to add the two mutually perpendicular moment of inertias.