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Size: 3046
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| Deletions are marked like this. | Additions are marked like this. |
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| * '''Cabinet:''' [:MechanicsCabinet:Mechanic (ME)] * '''Bay:''' [:MechanicsCabinetBayA1:(A1)] * '''Shelf:''' #1,2,3.. |
* Floor Item: ME, South Wall |
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| attachment: mainPhoto | attachment:AirTrackSetup12-400.jpg |
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| A glider on a level air track is pushed giving it a velocity which remains roughly constant on the low-friction surface. A timer together with a known displacement can be used to measure the velocity. | A glider on a level air track is pushed, giving it a velocity which remains roughly constant on the low-friction air track. With a known displacement and a stopwatch, one can then calculate the velocity. |
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| ||Air Track||ME, Bay B1, Shelf #2|| || ||Glider||ME, Bay B1, Shelf #2|| || ||PASCO Sensor||ME, Bay B1, Shelf #2|| || |
||Air Track||Floor Item: ME, South Wall|| || ||Air Gliders||ME, Bay A4, Shelf #2|| || ||Air Hose||ME, Bay B1, Shelf #2|| || |
| Line 28: | Line 25: |
| * ''''' ''''' | * This demonstration requires a supply of compressed air at HVHP. * A [:RedWhiteGasCart: Red & White Gas Cart] will need to be installed under the lecture tables and the air hose will need to be connected to the supply line within the stage floor. |
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| 1. List steps for setup then procedure. 1. ... |
1. Place air track on lecture bench. 1. Level the track using the set screws on each leg. 1. Connect the track to the air supply using the air hose. 1. Place air glider on track. 1. Let the air flow into the track by opening the supply valve. 1. Give the air glider a push to give it an initial velocity. |
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| * | * N/A |
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| Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate. | The kinematic version of Newton's first law says that a body in motion tends to stay in motion moving in a straight line unless acted upon by a force. This is exactly what is happening here. The glider is given an initial velocity being accelerated by the lecturer's hand. Upon release, the glider maintains its final velocity. The air track provides a low-friction surface for the glider to move on so not much energy can be lost as heat. Thus the speed will remain roughly constant. The direction will change, however. The velocity will switch between '''v,,0,,''' and -'''v,,0,,''' each time it hits a bumper in an elastic collision whereby the direction of its momentum is reversed. |
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| ||attachment: photo||attachment: photo||attachment: photo||attachment: photo|| | ||attachment:AirTrackSetup01-250.jpg||attachment:AirTrackSetup02-250.jpg||attachment:AirTrackSetup05-250.jpg||attachment:AirTrackSetup11-250.jpg|| ||attachment:AirTrackSetup14-250.jpg||attachment:AirTrackSetup18-250.jpg||attachment:AirTrack01-250.jpg||attachment:LargeGlider-250.jpg|| ||attachment:SmallGlider-250.jpg||attachment:AirHose-250.jpg||attachment:AirCompressor02-250.jpg||attachment:AirCompressor15-250.jpg|| ||attachment:Computer02-250.jpg||attachment:Photogates02-250.jpg|| |
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| * List any references | * N/A |
[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Constant Velocity Glider on Air Track, 1C10.27
Topic and Concept:
- Motion in One Dimension, [:MotionIn1D#Velocity: 1C10. Velocity]
Location:
- Floor Item: ME, South Wall
attachment:AirTrackSetup12-400.jpg
Abstract:
A glider on a level air track is pushed, giving it a velocity which remains roughly constant on the low-friction air track. With a known displacement and a stopwatch, one can then calculate the velocity.
Equipment |
Location |
ID Number |
|
|
|
Air Track |
Floor Item: ME, South Wall |
|
Air Gliders |
ME, Bay A4, Shelf #2 |
|
Air Hose |
ME, Bay B1, Shelf #2 |
|
Important Setup Notes:
- This demonstration requires a supply of compressed air at HVHP.
A [:RedWhiteGasCart: Red & White Gas Cart] will need to be installed under the lecture tables and the air hose will need to be connected to the supply line within the stage floor.
Setup and Procedure:
- Place air track on lecture bench.
- Level the track using the set screws on each leg.
- Connect the track to the air supply using the air hose.
- Place air glider on track.
- Let the air flow into the track by opening the supply valve.
- Give the air glider a push to give it an initial velocity.
Cautions, Warnings, or Safety Concerns:
- N/A
Discussion:
The kinematic version of Newton's first law says that a body in motion tends to stay in motion moving in a straight line unless acted upon by a force. This is exactly what is happening here. The glider is given an initial velocity being accelerated by the lecturer's hand. Upon release, the glider maintains its final velocity. The air track provides a low-friction surface for the glider to move on so not much energy can be lost as heat. Thus the speed will remain roughly constant. The direction will change, however. The velocity will switch between v0 and -v0 each time it hits a bumper in an elastic collision whereby the direction of its momentum is reversed.
attachment:AirTrackSetup01-250.jpg |
attachment:AirTrackSetup02-250.jpg |
attachment:AirTrackSetup05-250.jpg |
attachment:AirTrackSetup11-250.jpg |
attachment:AirTrackSetup14-250.jpg |
attachment:AirTrackSetup18-250.jpg |
attachment:AirTrack01-250.jpg |
attachment:LargeGlider-250.jpg |
attachment:SmallGlider-250.jpg |
attachment:AirHose-250.jpg |
attachment:AirCompressor02-250.jpg |
attachment:AirCompressor15-250.jpg |
attachment:Computer02-250.jpg |
attachment:Photogates02-250.jpg |
Videos:
[https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]
References:
- N/A
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