Factors Affecting Friction
Chapter Name : Friction |
Sub Topic Code : 101_08_12_02_01 |
Topic Name : Factors Affecting Friction |
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Sub Topic Name : Factors Affecting Friction |
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Introduction
Its easier to push a load on a smooth road than a rough one. Thus, smooth floor has a lower friction.
Pre-Requisites:
What is friction?
Activity:
Place an pencil cell on an inclined plane let it roll. Once it reaches the surface see what distance it has covered, now try this with keeping a cloth on the surface and sand paper as the surface. What do you observe?
Real Life Question:
Why do we slip on a very smooth floor but walk comfortably on a rough floor?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Roughness of Surface | The ease with which an object can be pushed on various surfaces, shows how smooth they are. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Inclined plane, cell, different surfaces | Test how fast or slow the cell moves down an inclined plane of different surface smoothness. |
Real life uses :
How can we use different types of surfaces( of different roughness) depending on the what is required.
Places to visit :
Children's Science Museum
Practical examples around us
| Examples | Explainations |
|---|---|
| rough outdoor surfaces | All outdoor surfaces are kept rough so we dont slip when it rains |
What you learn in Theory:
What effects the extent of friction.
What you learn in Practice:
How the various factors can be varied by external means or utilised to achieve smooth or rough surface.