Basic Idea:

• Check for conservation of momentum during elastic and inelastic collisions. (Note: the Pasco Dynamics tracks produce too much friction for this experiment)

• 8 

What:	How Many:	Where:
Pasco Dynamics Track	1	non-Majors storeroom, shelves J0 & JJ0      (look up!)
Pasco Collision Cart (w/o plunger - see below)	1	non-Majors storeroom, shelf F4
Pasco Dynamics Cart (with plunger - see below)	1	non-Majors storeroom, shelf F4
Photogates	2	non-Majors Storeroom, BB3
Vernier calipers	1	non-Majors storeroom, shelf BB3
Bubble level	1 (shared – there's only one)	Ask Jeff

Computers Needed?

• Yes.

• Lab Setup:

  

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• Equipment Setup:

  

  Note: Arrange outer track bumpers so that the velcro side points toward the carts (to prevent rebounding after collision)

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• Dynamics Cart:

  
  Image courtesy of PASCO Scientific

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• Collision Cart (shown with 500g mass block):

  
  Image courtesy of PASCO Scientific

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• Use the following procedure (before each class) to check that the tracks are level:
  
  1. Lay the bubble level along the length of the track; adjust as needed.
  2. Put the level crosswise on the track, over one of the supporting legs. Adjust as needed.
  3. Repeat with level over other set of supporting legs.
  4. Repeat procedure a.

• Set photogates to gate, 1 ms, and memory On (the red light is on).

• Carts should have flag installed to trip the photogate.

• On sunny days, the window shades should be drawn; bright sunlight will affect photogate performance.

• Be sure the tracks are as clean as possible

• Extra copies of the momentum data sheet should be printed!