## Axis of Rotation and Moment of Inertia Ranking Task

**Two identical uniform solid spheres are attached by a solid uniform thin rod, as shown in the figure. The **rod** lies on a line connecting the centers of mass of the two spheres. The axes A, B, C, and D are in the plane of the page (which also contains the centers of mass of the spheres and the **rod**), while axes E and F (represented by black dots) are perpendicular to the page.**

**A) Rank the moments of inertia of this object about the **axes** indicated.**

## Answer ( 1 )

The moments for axes A, B and C increase as the distances from the centre of mass increase.

From highest to lowest, therefore, the order is:

CandF(equal to each other),B, A and E(equal to each other),D