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Size: 1918
Comment:
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Size: 2572
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 11: | Line 11: |
| * '''Bay:''' [:MechanicsCabinetBayA10:(A10)] * '''Shelf:''' #1,2,3.. |
* '''Bay:''' [:MechanicsCabinetBayA8:(A8)] * '''Shelf:''' #4 |
| Line 14: | Line 14: |
| attachment: mainPhoto | attachment:Hoberman16-400.jpg |
| Line 22: | Line 22: |
| ||Hoberman Sphere||[:MechanicsCabinetBayB1: ME, Bay B1, Shelf #2]|| || ||all other parts||[:MechanicsCabinetBayB1: ME, Bay B1, Shelf #2]|| || |
||Hoberman Sphere||[:MechanicsCabinetBayA8: ME, Bay A8, Shelf #4]|| || ||String||[:MechanicsCabinetBayA8: ME, Bay A8, Shelf #2]|| || ||5 kg mass||[:MechanicsCabinetBayB1: ME, Bay B1, Shelf #1]|| || |
| Line 28: | Line 29: |
| * ''''' ''''' | * The Hoberman Sphere is fragile! Handle with care. |
| Line 44: | Line 45: |
| ||attachment: photo||attachment: photo||attachment: photo||attachment: photo|| | ||attachment:Hoberman01-250.jpg||attachment:Hoberman02-250.jpg||attachment:Hoberman03-250.jpg||attachment:Hoberman04-250.jpg|| ||attachment:Hoberman05-250.jpg||attachment:Hoberman06-250.jpg||attachment:Hoberman07-250.jpg||attachment:Hoberman08-250.jpg|| ||attachment:Hoberman09-250.jpg||attachment:Hoberman10-250.jpg||attachment:Hoberman11-250.jpg||attachment:Hoberman12-250.jpg|| ||attachment:Hoberman13-250.jpg||attachment:Hoberman14-250.jpg||attachment:Hoberman15-250.jpg||attachment:Hoberman17-250.jpg|| ||attachment:Hoberman18-250.jpg||attachment:Hoberman19-250.jpg||attachment:Hoberman20-250.jpg||attachment:Hoberman21-250.jpg|| |
[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Hoberman Sphere, 1Q40.22
Topic and Concept:
Rotational Dynamics, [:RotationalDynamics#ConsrvationAngMomentum: 1Q40. Conservation of Angular Momentum]
Location:
Cabinet: [:MechanicsCabinet:Mechanic (ME)]
Bay: [:MechanicsCabinetBayA8:(A8)]
Shelf: #4
attachment:Hoberman16-400.jpg
Abstract:
A collapsible sphere suspended from the ceiling is given a spin. A weight attached to the collapse mechanism is dropped causing the sphere to reduce its moment of inertia. Upon collapsing, the rotational speed of the sphere increase showing that angular momentum is conserved.
Equipment |
Location |
ID Number |
|
|
|
Hoberman Sphere |
[:MechanicsCabinetBayA8: ME, Bay A8, Shelf #4] |
|
String |
[:MechanicsCabinetBayA8: ME, Bay A8, Shelf #2] |
|
5 kg mass |
[:MechanicsCabinetBayB1: ME, Bay B1, Shelf #1] |
|
Important Setup Notes:
- The Hoberman Sphere is fragile! Handle with care.
Setup and Procedure:
- List steps for setup then procedure.
- ...
Cautions, Warnings, or Safety Concerns:
Discussion:
Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate.
attachment:Hoberman01-250.jpg |
attachment:Hoberman02-250.jpg |
attachment:Hoberman03-250.jpg |
attachment:Hoberman04-250.jpg |
attachment:Hoberman05-250.jpg |
attachment:Hoberman06-250.jpg |
attachment:Hoberman07-250.jpg |
attachment:Hoberman08-250.jpg |
attachment:Hoberman09-250.jpg |
attachment:Hoberman10-250.jpg |
attachment:Hoberman11-250.jpg |
attachment:Hoberman12-250.jpg |
attachment:Hoberman13-250.jpg |
attachment:Hoberman14-250.jpg |
attachment:Hoberman15-250.jpg |
attachment:Hoberman17-250.jpg |
attachment:Hoberman18-250.jpg |
attachment:Hoberman19-250.jpg |
attachment:Hoberman20-250.jpg |
attachment:Hoberman21-250.jpg |
Videos:
[https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]
References:
[https://en.wikipedia.org/wiki/Hoberman_sphere Wikipedia - Hoberman Sphere]
[https://en.wikipedia.org/wiki/Angular_momentum Wikipedia - Angular Momentum]
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