Question

Two of the things of the composite materials are to be known so that their mass moment of inertia can be varied. Which of the following is one of them?

(a) Weight of the centre of gravity

(b) Weight of the body

(c) Location of the centroid of gravity

(d) Location of the centre of mass

The question was asked in an online quiz.

Query is from Mass Moment of Inertia in chapter Moments of Inertia of Engineering Mechanics

Answer 1

Right option is (b) Weight of the body

To explain: The centre of gravity’s location and the weight of the composite body is needed to be known. This means that if both of the quantities of the composite body is known then the moment of inertia of the body can be altered. Thus both are very important things to be known about the composite bodies.