[:PiraScheme#Mechanics: Table of Mechanics Demonstration] [:MEEquipmentList: List of Mechanics Equipment & Supplies] [:Demonstrations:Lecture Demonstrations]

# Air Track Totally Inelastic Collision, 1N30.32

Topic and Concept:

• Linear Momentum, [:Linear_Momentum#Collisions1D: 1N30. Collisions in One Dimension]

Location:

• Floor Item: ME, South Wall attachment: mainPhoto

Abstract:

Insert succinct description of demonstration.

 Equipment Location ID Number Air Track ME, Bay B1, Shelf #2 Air Track Carts ME, Bay B1, Shelf #2 Red Clay Double Steel Door Bin Cabinet [:RedWhiteGasCart:Red & White Gas Carts] ME, Bay B1, Shelf #2

Important Setup Notes:

• N/A

Setup and Procedure:

1. Place air track on lecture bench, and connect the compressed air supply from the [:RedWhiteGasCart:Red & White Gas Cart] to the track using an air hose.

2. Make sure that the gliders to be used have clay on one side and that the clay juts out a little off center (see photo).
3. Place two gliders on the track, one on an end of the track and the other roughly in the middle.
4. Turn on the air supply.
5. Give the glider on the end a good push toward the glider at rest to create a collision.

Cautions, Warnings, or Safety Concerns:

• Make sure you are using compressed air and NOT methane gas which is extremely flammable!

Discussion:

In conservative systems, momentum is always conserved. In the lab frame, one glider is in motion and one is at rest. Thus, the total momentum of the system is P0 = m1 * v1 where m1 is the mass of the glider in motion and v1 is its speed. In an inelastic collision, the two bodies stick to each other. Since P0 = Pf , ignoring friction and air resistance, the speed of the two cars together is lower than the initial speed of the first glider. Pf = (m1 + m2) * v1+2.

 attachment:InelasticGliders-02-250.jpg attachment:InelasticLongGliders-03-250.jpg attachment:InelasticShortGliders-04-250.jpg attachment: photo

Videos:

References:

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