a system of four spheres with the same mass are spaced at equal distances along a weightless rod. the spheres are numbered from left to right. the axis of rotation that would create the greatest moment of inertia is

sphere 1 or sphere 2

The moment of inertia depends on the axis around which the object rotates. Objects usually rotate around the center of the table, but can rotate around any axis. The moment of inertia when rotating about an axis other than the center of mass occurs in a set of parallel axes.

Not sure though =(

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.