1F  NEWTON'S FIRST LAW

1F10  Measuring Inertia
            .11 Inertia Balance
            .31 Estimating Mass
1F20  Inertia of Rest
            .10 Inertia Ball
            .20 Smash Your Hand
            .22 Hit the Nail on the Head
            .30 Tablecloth Pull
            .31 Toilet Paper Roll
            .35 Eggs and Pizza Pan
1F30  Inertia of Motion
            .10 Persistence of Motion
            .14 Dry Ice on Slate
            .25 Spin the Egg