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'''Concept Table: [:Newtons1STLaw#InertiaofRest: 1F20. Inertia of Rest]''' |
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| (attachment photo showing the fully set up demonstration) | attachment:BeakerOnCloth02-400.jpg |
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| '''Description:''' | '''Abstract:''' |
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| AKA beaker and cloth. Pull the tablecloth out from under a place setting or a beaker of water and observe that the items remain on the table as expected from Newton's first law | AKA Beaker and Cloth. A beaker partially filled with water is placed on a seamless tablecloth favoring an edge. The tablecloth is quickly yanked out from under the beaker, leaving the beaker in place without spilling any water. Thus, illustrating Newton's first law. |
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| ||tablecloth in beaker||ME, Bay A7, Shelf #5|| || | ||Tablecloth||ME, Bay A7, Shelf #5|| || ||Two-Liter Beaker||ME, Bay A7, Shelf #5|| || |
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| A. '''''This demo will require practice.''''' | * '''''This demo will require practice.''''' |
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'''Setup:''' |
'''Setup and Procedure:''' |
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| 2. Fill a beaker with water, and place it on the tablecloth. | 2. Partially fill a beaker with water. Add food coloring to water for contrast. 3. Place beaker on and near an edge of the tablecloth. |
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| 1. Make sure to perform this demo with adequate distance from the audience to prevent exposure to flying glass in the event of a failed demo. | * Make sure to perform this demo with adequate distance from the audience to prevent exposure to flying glass in the event of a failed demo. * Make sure the cloth being used is free of seams or other defects that could trip the beaker. |
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| '''Discussion:''' | |
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| '''Demonstration:''' With a quick jerking motion, pull the tablecloth out from under the beaker. |
The quick jerking motion of the tablecloth has enough force to overcome the normal force of the beaker and the frictional force. Since one pull the tablecloth out from under the beaker or something that has weight. |
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| ||attachment other photos||attachment other photos|| ||attachment other photos||attachment other photos|| |
||attachment:BeakerCloth04-250.jpg||attachment:Beaker01-250.jpg||attachment:Cloth02-250.jpg|| |
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| 1. List any references | * [http://sprott.physics.wisc.edu/demobook/intro.htm Clint Sprott] |
[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Tablecloth Pull, 1F20.30
Concept Table: [:Newtons1STLaw#InertiaofRest: 1F20. Inertia of Rest]
Location:
Cabinet: [:MechanicsCabinet:Mechanic (ME)]
Bay: [:MechanicsCabinetBayA7:(A7)]
Shelf: #5
attachment:BeakerOnCloth02-400.jpg
Abstract:
AKA Beaker and Cloth. A beaker partially filled with water is placed on a seamless tablecloth favoring an edge. The tablecloth is quickly yanked out from under the beaker, leaving the beaker in place without spilling any water. Thus, illustrating Newton's first law.
Equipment |
Location |
ID Number |
|
|
|
Tablecloth |
ME, Bay A7, Shelf #5 |
|
Two-Liter Beaker |
ME, Bay A7, Shelf #5 |
|
Important Setup Notes:
This demo will require practice.
Setup and Procedure:
- Place the tablecloth on a table.
- Partially fill a beaker with water. Add food coloring to water for contrast.
- Place beaker on and near an edge of the tablecloth.
Cautions, Warnings, or Safety Concerns:
- Make sure to perform this demo with adequate distance from the audience to prevent exposure to flying glass in the event of a failed demo.
- Make sure the cloth being used is free of seams or other defects that could trip the beaker.
Discussion:
The quick jerking motion of the tablecloth has enough force to overcome the normal force of the beaker and the frictional force. Since one pull the tablecloth out from under the beaker or something that has weight.
attachment:BeakerCloth04-250.jpg |
attachment:Beaker01-250.jpg |
attachment:Cloth02-250.jpg |
Videos
[http://youtu.be/gfEvFtQWvUY Tablecloth Pull, 1F20.30]
[https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]
References:
[http://sprott.physics.wisc.edu/demobook/intro.htm Clint Sprott]
[:Instructional:Home]