The moment of inertia of a disc about one of its diameters is:

The moment of inertia of a rod of mass M, length l about an axis perpendicular to it through one end is:

1.  ${\mathrm{Ml}}^2$

2.  $\frac{{\mathrm{Ml}}^2}{2}$

3.  $\frac{{\mathrm{Ml}}^2}{3}$

4.  Can't be determined

The moment of inertia of a ring about a tangent to the circle of the ring is:

1.   ${\mathrm{MR}}^2$

2.  $\frac{{\mathrm{MR}}^2}{2}$

3.  $\frac{3{\mathrm{MR}}^2}{2}$

4.  $\frac{{\mathrm{MR}}^2}{3}$