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