PASCO ME-6991 Instruction Manual
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PASCO ME-6991 Instruction Manual

Bridge set
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I n s t r u c t i o n M a n u a l
®
012-10656D
*012-10656*
Bridge Set
ME-6991

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Summary of Contents for PASCO ME-6991

  • Page 1 I n s t r u c t i o n M a n u a l ® 012-10656D *012-10656* Bridge Set ME-6991...

  • Page 2: Table Of Contents

    Table of Contents Included Equipment ........... . . 3 Related Equipment .

  • Page 3: Included Equipment

    Bridge Set ME-6991 Included Equipment Included Equipment A. #5 Beam (24 cm long) I. Mini-car Starter Bracket B. #4 Beams (17 cm long) J. Mini-car C. #3 Beams (11.5 cm long) K. Photogate Flag D. #2 Beams (8 cm long) L.

  • Page 4: Related Equipment

    Introduction The Bridge Set is one part of the PASCO Structures System. Although the Bridge Set can be used as a stand-alone set, it can also be combined with other parts of the PASCO Structures System. The Load Cell and Amplifier Set (PS-2199) can be added to measure compression and tension forces in the structure members and other sets of plastic parts are available.
  • Page 5 M o d e l N o . M E - 6 9 9 1 A b o u t t h e C o m p o n e n t s Attaching Cords When attaching cords for lateral bracing or for suspension or Cord cable-stayed bridges, Cord Tensioning Clips are used to assist in adjusting the tension in the cords.

  • Page 6: Adding Load Cells

    (approximately 1 cm) and measure the time between the events when the infrared beam is blocked. The Accessory Photogate with Stand (PASCO Model ME-9204B) is useful as a free-standing photogate. Adding Load Cells To measure the compression and tension forces in individ- ual members, add load cells (PASCO Model PS-2199) to any PASCO Structure.

  • Page 7: Properties Of I-Beams

    M o d e l N o . M E - 6 9 9 1 P r o p e r t i e s o f I - b e a m s Example: Bridge with Load Cells The bridge shown in Figure 11 incorporates six load cells to measure the tension or compression in various members.

  • Page 8: Trusses

    B r id g e S e t T r u s s e s Trusses Kingpost Truss Figure 13 shows a simple king- post truss made from #5 and #4 beams. Use a hanging mass to apply a load. Lay the kingpost truss on the table to comare its horizontal Figure 13: A simple...

  • Page 9: Common Truss Bridges

    M o d e l N o . M E - 6 9 9 1 Roof Truss Use #4 and #5 beams to build a simple roof truss or a roof truss structure with legs Figure 16: Roof truss Common Truss Bridges Warren Bridge The Warren Bridge (Figure 17) is a simple type of bridge consisting of a series of triangles.
  • Page 10 B r id g e S e t W a r r e n B r i d g e In spanning a particular distance, why wouldn’t you use the smaller scale bridge and add more panels? An exami- nation of the forces in the memebers of each size bridge will give the answer.

  • Page 11: Measuring Bridge Deflection Under Load

    Using a Motion Sensor In Figure 24, the bridge is loaded by hanging a weight (Large Slotted Mass Set, PASCO Model ME-7566) from the center of the bridge. A Motion Sensor (PS-2103) is placed on the floor and pointed up toward the bottom of the weight hanger.

  • Page 12: Bridge Challenges For Students

    B r i d g e S e t Br id g e C h a ll e n g e s f o r S t u d e n t s Bridge Challenges for Students Perhaps the best way for students to learn about bridges is to give them a task to accomplish wth limited resources by any means possible.

  • Page 13: Bridges That Require Two Or More Bridge Sets

    M o d e l N o . M E - 6 9 9 1 B r i d g e s T h a t R e q u i r e T w o o r M o r e B r i d g e S e t s Bridges That Require Two or More Bridge Sets Note that the Tied Arch Bridge is constructed using the I-beams sideways for the arched part of...

  • Page 14: Dynamics Track

    Mini-car, a Photogate can be used with the pulley to measure the rotation of the pulley. The Photo- gate/Pulley System (ME-6838) and the Table Clamp (ME-8995) are available separately from PASCO. See Figure 33. Figure 33: Using a Photogate with Pulley...
  • Page 15 M o d e l N o . M E - 6 9 9 1 R o l l e r c o a s t e r D e s i g n C h a l l e n g e s Loop Design Challenge Design a rollercoaster loop such that the Mini-car makes it around the loop.

  • Page 16: Technical Support

    Reproduction under any other circumstances, without the written consent of PASCO scientific, is prohib- ited.

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