1J  STATICS OF RIGID BODIES

1J10  Finding Center of Gravity
            .12 Hanging Board
            .25 Unequal Balance
            .30 Meterstick on Fingers
1J11  Exceeding Center of Gravity
            .10 Leaning Tower of Pisa
            .50 Double Cone
1J20  Stable, Unstable, and Neutral Equilibrium
            .15 Ball and Block Stability
            .20 Fork, Spoon, and Match
            .21 Pitchfork and Shovel
            .30 Sky Hook
            .36 Balancing Eagle
            .40 Balancing Man
            .45 Tightrope Walking - Ernest
1J30  Resolution of Forces
            .15 Normal Force
            .25 Rope and 3 Students
            .50 Magnetic Board Mechanics Set
1J40  Static Torque
            .15 Torque Wrench
            .20 Meterstick Balance
            .23 Rock and Rod
            .25 Torque Wheel
            .40 Loaded Beam - Force Plate
            .41 Loaded Beam on Scales