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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, North Wall |
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| ||apparatus||ME, Bay B1, Shelf #2|| || ||all other parts||ME, Bay B1, Shelf #2|| || ||...||ME, Bay B1, Shelf #2|| || |
||Ellipse Board w/ Supplies||Floor Item: ME, North Wall|| || |
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| * ''''' ''''' | * N/A |
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| 1. List steps for setup then procedure. 1. ... |
1. Put two pegs in the holes on the board to be the desired focal points. 1. Hang the string loop over the two pegs. 1. Using the string pulled taught as a constraint, place the marker inside the loop, and draw the ellipse. |
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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 mathematical definition of an ellipse is the set of all points in the plane such that the sum of the distances to the point from the two foci is constant. This definition gives insight into why this drawing method should give an ellipse. Ellipses are a type of conic section that play an important role in orbital motion. They are a crucial ingredient in Kepler's laws. |
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| ||attachment: photo||attachment: photo||attachment: photo||attachment: photo|| | ||attachment:EllipseBoard-09-250.jpg||attachment:EllipseBoard-13-250.jpg|||attachment:EllipseBoard-15-250.jpg||attachment:EllipseBoard-16-250.jpg|| ||attachment:EllipseBoard-17-250.jpg|||attachment:EllipseBoard-18-250.jpg||attachment:EllipseBoard-19-250.jpg||attachment:EllipseBoardEQ-01-250.jpg|| ||attachment:EllipseBoardEQ-02-250.jpg||attachment:EllipseBoardEQ-03-250.jpg||attachment:EllipseBoardEQ-04-250.jpg|| || |
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| * List any references | * [https://en.wikipedia.org/wiki/Ellipse Ellipse - Wikipedia] * [https://en.wikipedia.org/wiki/Kepler%27s_laws_of_planetary_motion Kepler's Laws - Wikipedia] |
[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Ellipse Board, 1L20.45
Topic and Concept:
- Gravity, [:Gravity#Orbits: 1L20. Orbits]
Location:
- Floor Item: ME, North Wall
attachment:EllipseBoard-13-400.jpg
Abstract:
- The two pegs and string method for ellipse drawing on a whiteboard.
Equipment |
Location |
ID Number |
|
|
|
Ellipse Board w/ Supplies |
Floor Item: ME, North Wall |
|
Important Setup Notes:
- N/A
Setup and Procedure:
- Put two pegs in the holes on the board to be the desired focal points.
- Hang the string loop over the two pegs.
- Using the string pulled taught as a constraint, place the marker inside the loop, and draw the ellipse.
Cautions, Warnings, or Safety Concerns:
- N/A
Discussion:
The mathematical definition of an ellipse is the set of all points in the plane such that the sum of the distances to the point from the two foci is constant. This definition gives insight into why this drawing method should give an ellipse. Ellipses are a type of conic section that play an important role in orbital motion. They are a crucial ingredient in Kepler's laws.
attachment:EllipseBoard-09-250.jpg |
attachment:EllipseBoard-13-250.jpg |
|attachment:EllipseBoard-15-250.jpg |
attachment:EllipseBoard-16-250.jpg |
attachment:EllipseBoard-17-250.jpg |
|attachment:EllipseBoard-18-250.jpg |
attachment:EllipseBoard-19-250.jpg |
attachment:EllipseBoardEQ-01-250.jpg |
attachment:EllipseBoardEQ-02-250.jpg |
attachment:EllipseBoardEQ-03-250.jpg |
attachment:EllipseBoardEQ-04-250.jpg |
|
Videos:
[https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]
References:
[https://en.wikipedia.org/wiki/Ellipse Ellipse - Wikipedia]
[https://en.wikipedia.org/wiki/Kepler%27s_laws_of_planetary_motion Kepler's Laws - Wikipedia]
[:Instructional:Home]