[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Maxwell's Yo-Yo, 1M40.50
Topic and Concept:
Work and Energy, [:WorkEnergy#ConservationOfEnergy: 1M40. Conservation of Energy]
Location:
Cabinet: [:MechanicsCabinet:Mechanic (ME)]
Bay: [:MechanicsCabinetBayA1:(A1)] ?
Shelf: #?
attachment:yoYo01-400.jpg
Abstract:
A large disc is suspended from a small axle so the string unwinds on the way down and rewinds on the way up showing that rotational energy is conserved.
Equipment |
Location |
ID Number |
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|
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Yo-yos |
[:MechanicsCabinetBayB1: ME, Bay B1, Shelf #2]?? |
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Important Setup Notes:
- N/A
Setup and Procedure:
- Choose a yo-yo.
- Wind up the attached string around the small axle wedged between the two larger, outer discs.
- Put your index finger through the loop at the end of the string while holding the yo-yo in the opposite hand.
- When ready, keeping your hand with the looped over finger in place, let the yo-yo drop. As it drops, it will pick up rotational speed until all the string unwinds. Upon hitting this point, it will wind up again approaching your hand.
- If desired, repeat with other yo-yos.
Cautions, Warnings, or Safety Concerns:
- N/A
Discussion:
Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate.
attachment:yoYo02-250.jpg |
attachment:yoYo03-250.jpg |
attachment:yoYo04-250.jpg |
attachment:yoYo05-250.jpg |
attachment:yoYo06-250.jpg |
attachment:yoYo07-250.jpg |
Videos:
[https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]
References:
[https://en.wikipedia.org/wiki/Energy Wikipedia - Energy]
[https://en.wikipedia.org/wiki/Kinetic_energy#Rotating_bodies Wikipedia - Rotational Kinetic Energy]
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