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⇤ ← Revision 1 as of 2012-07-20 19:55:05
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| Deletions are marked like this. | Additions are marked like this. |
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| * '''Bay:''' [:MechanicsCabinetBayA1:(A1)] * '''Shelf:''' #1,2,3.. |
* '''Bay:''' [:MechanicsCabinetBay:()] * '''Shelf:''' # |
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| Insert succinct description of demonstration. | A bulldozer powered by an electric motor moves in the same or opposite direction as the sheet which moves beneath it to show addition and subtraction of velocities. |
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| ||apparatus||ME, Bay B1, Shelf #2|| || ||all other parts||ME, Bay B1, Shelf #2|| || |
||Bulldozer||ME, Bay , Shelf #|| || ||Sheet of Paper or Paperboard|| Provide Own or Ask Ahead of Time|| || |
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| 1. List steps for setup then procedure. 1. ... |
1. Place sheet of paper or paperboard on table. 1. Turn on the bulldozer by flipping the switch to the "on" position. 1. Place the bulldozer on the sheet. 1. Pull or push the sheet to show subtractive and additive velocities, respectively. |
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| Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate. | If the paper is moving in the same direction as the bulldozer, the velocity of the bulldozer relative to the audience will be the sum of the sheet and bulldozer velocities - simple vector addition. Likewise, if the sheet moves in the opposite direction as the bulldozer, the velocity of the bulldozer will be the difference of the two velocities - simple vector subtraction. |
[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Bulldozer on Moving Sheet, 1C10.10
Topic and Concept:
- Motion in One Dimension, [:MotionIn1D#Velocity: 1C10. Velocity]
Location:
Cabinet: [:MechanicsCabinet:Mechanic (ME)]
Bay: [:MechanicsCabinetBay:()]
Shelf: #
attachment:Bulldozer01-400.jpg
Abstract:
A bulldozer powered by an electric motor moves in the same or opposite direction as the sheet which moves beneath it to show addition and subtraction of velocities.
Equipment |
Location |
ID Number |
|
|
|
Bulldozer |
ME, Bay , Shelf # |
|
Sheet of Paper or Paperboard |
Provide Own or Ask Ahead of Time |
|
Important Setup Notes:
- N/A
Setup and Procedure:
- Place sheet of paper or paperboard on table.
- Turn on the bulldozer by flipping the switch to the "on" position.
- Place the bulldozer on the sheet.
- Pull or push the sheet to show subtractive and additive velocities, respectively.
Cautions, Warnings, or Safety Concerns:
- N/A
Discussion:
If the paper is moving in the same direction as the bulldozer, the velocity of the bulldozer relative to the audience will be the sum of the sheet and bulldozer velocities - simple vector addition. Likewise, if the sheet moves in the opposite direction as the bulldozer, the velocity of the bulldozer will be the difference of the two velocities - simple vector subtraction.
attachment:Bulldozer02-250.jpg |
attachment:Bulldozer03-250.jpg |
attachment:Bulldozer04-250.jpg |
Videos:
[https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]
References:
- N/A
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