1G  NEWTON'S SECOND LAW

1G10  Force, Mass and Acceleration
            .10 String and Weight Acceleration
            .16 Acceleration with Spring
            .40 Atwood's Machine
1G20  Accelerated Reference Frames
            .10 Candle in Dropped Jar
            .45 Dropped Slinky
            .70 Local Vertical with Acceleration
            .76 Accelerometers
1G30  Complex Systems