Needs New Photo

B2-04: VERTICAL FORCES - FOUR SPRING SCALES
B2-11: EQUILIBRIUM OF FORCES - OHAUS PROJECTION
B2-12: EQUILIBRIUM OF FORCES - BOARD BACKGROUND
B2-14: SUM OF FORCES - LARGE ROPE VERSION
B2-21: CONCEPT OF TORQUE - TORSIONAL CHAIR
B2-31: EQUILIBRIUM OF TORQUES - WHEELS AND AXLES
B2-33: EQUILIBRIUM OF TORQUES - SMALL
B2-34: EQUILIBRIUM OF TORQUES - ANGLE BRACKET
B2-35: EQUILIBRIUM OF TORQUES ON METERSTICK
B2-36: EQUILIBRIUM OF TORQUES ON METERSTICK - ROTATORS
B2-42: ARM MODEL
B2-43: CRANE BOOM
B3-01: LEVER AND LOADED WAGON
B3-02: LEVERS - THREE CLASSES
B3-11: PULLEY - HUMAN LIFT
B3-14: EQUILIBRIUM PARADOX - SCALES AND PULLEY
B3-15: FOOL'S TACKLE
B4-04: SPRING AND STRING THING
B4-11: ELASTIC LIMIT OF RUBBER BAND
B4-14: ELASTIC LIMIT OF WIRE

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