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Size: 1461
Comment:
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Size: 2185
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 11: | Line 11: |
| * '''Bay:''' [:MechanicsCabinetBayA1:(A1)] * '''Shelf:''' #1,2,3.. |
* '''Bay:''' [:MechanicsCabinetBayB4:(B4)] * '''Shelf:''' #2 |
| Line 18: | Line 18: |
| Insert succinct description of demonstration. | A bulldozer powered by an electric motor moves in the same or opposite direction as the sheet which is moves beneath it to show addition and subtraction of velocities. |
| Line 22: | Line 22: |
| ||apparatus||ME, Bay B1, Shelf #2|| || ||all other parts||ME, Bay B1, Shelf #2|| || |
||Bulldozer||ME, Bay B4, Shelf #2|| || ||Sheet of stock board|| ME, Bay C4, (Cubby)|| || |
| Line 27: | Line 27: |
| * N/A | * '''''The power switch is flaky and touchy ''''' * '''''Please remove the batteries after use to prevent corrosion. ''''' |
| Line 32: | Line 33: |
| 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. (Note: Not all the way to "on") 1. Place the bulldozer on the sheet. 1. Pull or push the sheet to show subtractive and additive velocities, respectively. |
| Line 41: | Line 44: |
| 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: [:MechanicsCabinetBayB4:(B4)]
Shelf: #2
attachment:Bulldozer01-400.jpg
Abstract:
A bulldozer powered by an electric motor moves in the same or opposite direction as the sheet which is moves beneath it to show addition and subtraction of velocities.
Equipment |
Location |
ID Number |
|
|
|
Bulldozer |
ME, Bay B4, Shelf #2 |
|
Sheet of stock board |
ME, Bay C4, (Cubby) |
|
Important Setup Notes:
The power switch is flaky and touchy
Please remove the batteries after use to prevent corrosion.
Setup and Procedure:
- Place sheet of paper or paperboard on table.
- Turn on the bulldozer by flipping the switch to the "on" position. (Note: Not all the way to "on")
- 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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