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 attachment: mainPhoto attachment:InelasticActionShot02-400.jpg
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Insert succinct description of demonstration.		   A moving glider collides with a stationary one and sticks.
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||Air Track||ME, Bay B1, Shelf #2|| ||
||Air Track Carts||ME, Bay B1, Shelf #2|| ||		 ||2.25 m Air Track||Floor Item: ME, South Wall|| ||
||Small & Large Air Track Gliders||ME, Bay A4, Shelf #4|| ||
||Red Clay||Double Steel Door Bin Cabinet|| ||
||Air Hose||Floor Item: ME, South Wall|| ||
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 * ''''' '''''  * This demonstration requires a supply of compressed air, permanent supplies located in rooms 2103, 2223, 2241.
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 1. List steps for setup then procedure.
 1. ...		  1. Place air track on lecture bench, and connect the compressed air supply from the lower white panel of the [:RedWhiteGasCart:Red & White Gas Cart] to the track using an air hose.
 1. 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).
 1. Place two gliders on the track, one on an end of the track and the other roughly in the middle.
 1. Turn on the air supply by opening the valve located on the lower white panel of the cart.
 1. If the gliders seem to slide in one direction, this is most likely due to the track being unlevel. Adjust the set screws until this no longer occurs. It is a good idea to do this ahead of time.
 1. Give the glider on the end a good push toward the glider at rest to create a collision.
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 *  * Make sure you are using compressed air (white panel) and NOT methane gas (red panel) which is extremely flammable!
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Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate. 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 P,,0,, = m,,1,, * v,,1,, where m,,1,, is the mass of the glider in motion and v,,1,, is its speed. In an inelastic collision, the two bodies stick to each other. Since P,,0,, = P,,f,, , ignoring friction and air resistance, the speed of the two cars together is lower than the initial speed of the first glider. P,,f,, = (m,,1,, + m,,2,,) * v,,1+2,,.
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||attachment: photo||attachment: photo||attachment: photo||attachment: photo|| ||attachment:InelasticGliders-02-250.jpg||attachment:InelasticLongGliders-03-250.jpg||attachment:InelasticShortGliders-04-250.jpg||attachment:AirTrackWithGliders-250.jpg||
||attachment:InelasticActionShot01-250.jpg||attachment:InelasticActionShot03-250.jpg||attachment:InelasticActionShot04-250.jpg||attachment:InelasticActionShot05-250.jpg||
||attachment:AirHose03-250.jpg||attachment:AirHose02-250.jpg||attachment:AirHose01-250.jpg||
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 * List any references  * [http://hyperphysics.phy-astr.gsu.edu/hbase/elacol.html Elastic & Inelastic Collisions - Hyperphysics]
 * [https://en.wikipedia.org/wiki/Inelastic_collision Inelastic Collisions - Wikipedia]

[: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:InelasticActionShot02-400.jpg

Abstract:

A moving glider collides with a stationary one and sticks.

Equipment

Location

ID Number

2.25 m Air Track

Floor Item: ME, South Wall

Small & Large Air Track Gliders

ME, Bay A4, Shelf #4

Red Clay

Double Steel Door Bin Cabinet

Air Hose

Floor Item: ME, South Wall

[:RedWhiteGasCart:Red & White Gas Carts]

ME, Bay B1, Shelf #2

Important Setup Notes:

  • This demonstration requires a supply of compressed air, permanent supplies located in rooms 2103, 2223, 2241.

Setup and Procedure:

  1. Place air track on lecture bench, and connect the compressed air supply from the lower white panel of 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 by opening the valve located on the lower white panel of the cart.
  5. If the gliders seem to slide in one direction, this is most likely due to the track being unlevel. Adjust the set screws until this no longer occurs. It is a good idea to do this ahead of time.
  6. 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 (white panel) and NOT methane gas (red panel) 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:AirTrackWithGliders-250.jpg

attachment:InelasticActionShot01-250.jpg

attachment:InelasticActionShot03-250.jpg

attachment:InelasticActionShot04-250.jpg

attachment:InelasticActionShot05-250.jpg

attachment:AirHose03-250.jpg

attachment:AirHose02-250.jpg

attachment:AirHose01-250.jpg

Videos:

References:

[:Instructional:Home]

fw: Air_Track_Totally_Inelastic_Collision (last edited 2013-07-12 18:17:44 by localhost)