| 1 | Just I would have to sum the square of a distance to the axis of rotation. | |
| 2 | The closer an object's weight is to its axis of rotation, the faster it spins. | |
| 3 | For the moment of inertia, we want the square of a distance to the axis of rotation. | |
| 4 | Consider a ball that is spinning about an axis perpendicular to the flow of air across it (see left). | |
| 5 | You can spin the board around many different axis, and even combine several rotations in to one trick . |