|
Size: 1543
Comment:
|
Size: 2295
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 5: | Line 5: |
'''Topic and Concept:''' Newton's First Law, [:Newtons1STLaw#InertiaofRest: 1F20. Inertia of Rest] |
|
| Line 11: | Line 14: |
| (attachment photo showing the fully set up demonstration) | attachment:BeakerOnCloth02-400.jpg |
| Line 13: | Line 16: |
| '''Description:''' | '''Abstract:''' |
| Line 15: | Line 18: |
| 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. |
| Line 19: | Line 22: |
| ||tablecloth in beaker||ME, Bay A7, Shelf #5|| || | ||Tablecloth||ME, Bay A7, Shelf #5|| || ||Two-Liter Beaker||ME, Bay A7, Shelf #5|| || |
| Line 22: | Line 26: |
| A. '''''This demo will require practice.''''' | * '''''This demo will require practice.''''' |
| Line 25: | Line 29: |
'''Setup:''' |
'''Setup and Procedure:''' |
| Line 29: | Line 32: |
| 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. |
| Line 32: | Line 36: |
| 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. |
| Line 35: | Line 40: |
| '''Discussion:''' | |
| Line 36: | Line 42: |
| '''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. |
| Line 39: | Line 44: |
| ||attachment other photos||attachment other photos|| ||attachment other photos||attachment other photos|| |
||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] |
| Line 44: | Line 54: |
| 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
Topic and Concept:
Newton's First Law, [: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]