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Wheels Reduce Friction
Chapter Name : Friction
Sub Topic Code : 101_08_12_05_01
Topic Name : Wheels Reduce Friction
Sub Topic Name : Wheels Reduce Friction
Introduction

What does friction depend upon and how rolling friction is lesser than sliding friction?

Pre-Requisites:

Force, Friction

Activity:

Get a circular/cylindrical object of 1N from your physics lab, preferably a weight. Now try rolling it and then try pushing it when its lying on its bottom. Which is easier?

Real Life Question:

Its easier to roll a cylinder than to slide it. Why?

Key Words / FlashCards
Key Words Definitions (pref. in our own words)
Rolling Friction The friction between the object being rolled and the surface.
Sliding Friction The friction between the object being slid and the durface
Learning aids / Gadgets
Gadgets How it can be used
Circular object (miniature wheel) Feel the difference when you try to roll and when you try to slide the object (s) of same mass
Real life uses :

Vehicles have wheels as they reduce friction and thus require less energy to move. Thus require less fuel and more efficient

Places to visit :

Children'd Museum

Practical examples around us
Examples Explainations
Cars Wheels reduce friction. All automoblies and even bicycles have wheels and not flat sliders because of lesser friction
What you learn in Theory:

Wheels reduce friction, i.e. rolling friction is lesser than sliding and thus, very helpful.

What you learn in Practice:

Appreciation of the use of wheels in all automotive applications

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