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1K20.u1 - Friction of Overlapping Catalog Pages

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​1K20.u1 - Friction of Overlapping Catalog Pages

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Title1K20.u1 - Friction of Overlapping Catalog Pages
Objective

Demonstrate the g-dependence of friction with two catalogs.

StatusAvailable
Assembly Instructions

Instructions
Put two catalogs of similar sizes (but not too thick, roughly ~1 inch in thickness is good) on a cart. They should be able to shuffle together easily.

Setup Time5
Operation Time
Preview Time
Operation Instructions

Operation Steps
1   "Shuffle" the pages together. This doesn't have to be perfect, just shoot for surface area.
2   Once the pages are overlapping, make the catalog upright and press together to get the pages even more greatly overlapping.
3   Rotate the catalogs so the plane of overlap is parallel to the floor. Try to pull the catalogs apart. Invite a student to help you.
4   Upright the catalogs, and have the student pull the catalogs apart alone.

ExportableYes
Demo on DimeYes
PIRA 200No
Export Instructions (if different)
HazardsNone
Analysis/Information

Overview
The magnitude of friction depends on gravity. When gravity is at play (is perpendicular to the overlapping surfaces) then that amount of overlapping surface area
Analysis
The magnitude of friction depends on gravity. When gravity is at play (is perpendicular to the overlapping surfaces) then that amount of overlapping surface area and mass is available to gravity, a person can't overcome the friction to pull the books apart. However, when the book is upright (the surface area is perpendicular to gravity) then the magnitude of friction is neglegible and the books separate readily.

Category1 Mechanics
Subcategory1K - Applications of Newton's Laws
Keywordsfriction
Construction Information
 
  
  
catalog
2