1C10  Velocity
            .10 Bulldozer on Moving Sheet
            .11 Helicopter Motion
            .25 Constant Velocity (Airtrack)
1C20  Uniform Acceleration
            .10 Guinea and Feather
            .12 Hammer and Feather on Moon
            .20 String and Weights Drop
            .30 Constant Acceleration
            .41 Rolling Ball on Incline
1C30  Measuring g
            .55 Reaction Time Falling Meter Stick