Differences between revisions 8 and 9

Bulldozer on Moving Sheet, 1E10.10 or 1C10.10

Topic and Concept:

Moving Reference Frames, 1E10. Relative Motion
Motion in One Dimension, 1C10. Velocity

pira200 Listed

Location:

Cabinet: Mechanic (ME)
Bay: (B4)
Shelf: #2

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 Relative Motion in the content of 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 left position or "forward" direction. (Note: Not all the way to the "left" works better. The switch is located at the rear of the bulldozer.)
Place the bulldozer on the sheet.
Pull or push the sheet to show subtractive and additive velocities, respectively.

Cautions, Warnings, or Safety Concerns:

The 3 position switch was badly corroded years ago and is quite touchy.
One may have to flip the switch back and forth several time to get the bulldozer to work.
Don't move the switch all the way left or right, just far enough to make contact, about 2/3 the way over.

Discussion:

If the paper is moving in the same direction as the bulldozer, the velocity of the bulldozer relative to the audience/table 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. One can have the bulldozer move diagonally across the sheet while the sheet is being moved. making use of a ceiling camera, the student will be able to see the relative motion better.

Videos:

Lecture Demonstration's Youtube Channel

References:

Home

-  ⇤ ← Revision 8 as of 2013-07-12 18:17:36 → 
  Size: 2891
  Editor: localhost
  Comment: converted to 1.6 markup
+   ← Revision 9 as of 2018-07-18 16:33:41 → ⇥
  Size: 3070
  Editor: srnarf
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 2:
-||<:30%>[[PiraScheme#Mechanics| Table of Mechanics Demonstration]]||<:30%>[[MEEquipmentList| List of Mechanics Equipment & Supplies]]||<:30%>[[Demonstrations|Lecture Demonstrations]]||
+||<30%  style="text-align:center">[[PiraScheme#Mechanics|Table of Mechanics Demonstration]] ||<30%  style="text-align:center">[[MEEquipmentList|List of Mechanics Equipment & Supplies]] ||<30%  style="text-align:center">[[Demonstrations|Lecture Demonstrations]] ||
-Line 5:
+Line 6:
+'''Topic and Concept:'''
-Line 6:
+Line 8:
-'''Topic and Concept:'''
 1. Moving Reference Frames, [[RelativeMotion| 1E10. Relative Motion]]
 1. Motion in One Dimension, [[MotionIn1D#Velocity| 1C10. Velocity]]
+. Moving Reference Frames, [[RelativeMotion|1E10. Relative Motion]]
 1. Motion in One Dimension, [[MotionIn1D#Velocity|1C10. Velocity]]

'''pira200 Listed'''
-Line 11:
+Line 14:
-Line 20:
+Line 24:
-||<:style="width: 60%" :40%>'''Equipment'''||<:30%>'''Location'''||<:25%>'''ID Number'''||
+||<40%  style="&quot; ;text-align:center">'''Equipment''' ||<30%  style="text-align:center">'''Location''' ||<25%  style="text-align:center">'''ID Number''' ||
-Line 23:
+Line 26:
-||Bulldozer||ME, Bay B4, Shelf #2|| ||
||Sheet of stock board|| ME, Bay C4, (Cubby)|| ||
+||Bulldozer ||ME, Bay B4, Shelf #2 || ||
||Sheet of stock board ||ME, Bay C4, (Cubby) || ||
-Line 27:
+Line 30:
-'''''Important Setup Notes:''''' 
 *  '''''The power switch is flaky and touchy '''''
 *  '''''Please remove the batteries after use to prevent corrosion. '''''
 Line 32:
-'''Setup and Procedure:'''
+'''''Important Setup Notes:'''''

 * '''''The power switch is flaky and touchy '''''
 * '''''Please remove the batteries after use to prevent corrosion. '''''

'''Setup and Procedure:'''
-Line 37:
+Line 42:
 . Pull or push the sheet to show subtractive and additive velocities, respectively.
-Line 40:
+Line 45:
- * The 3 position switch was badly corroded years ago and is quite touchy.
+ * The 3 position switch was badly corroded years ago and is quite touchy.
-Line 44:
+Line 50:
+'''Discussion:'''
-Line 45:
+Line 52:
-'''Discussion:'''
+If the paper is moving in the same direction as the bulldozer, the velocity of the bulldozer relative to the audience/table 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. One can have the bulldozer move diagonally across the sheet while the sheet is being moved.  making use of a ceiling camera, the student will be able to see the relative motion better.
|| {{attachment:Bulldozer02-250.jpg}} || {{attachment:Bulldozer03-250.jpg}} || {{attachment:Bulldozer04-250.jpg}} ||
-Line 47:
+Line 55:
-If the paper is moving in the same direction as the bulldozer, the velocity of the bulldozer relative to the audience/table 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. One can have the bulldozer move diagonally across the sheet while the sheet is being moved.  making use of a ceiling camera, the student will be able to see the relative motion better.
-Line 49:
+Line 56:
-||{{attachment:Bulldozer02-250.jpg}}||{{attachment:Bulldozer03-250.jpg}}||{{attachment:Bulldozer04-250.jpg}}||
-Line 52:
+Line 59:
-Line 58:
+Line 66:

fw: Diff for "Bulldozer_on_Moving_Sheet"

Bulldozer on Moving Sheet, 1E10.10 or 1C10.10