Rolling Friction

Author:Shobhita Johari, Pankaj Tyagi & Parminder Chopra
8th CBSE
IMPORTANT

Rolling Friction: Overview

The topic discusses rolling friction using examples. We learn how the rolling friction force makes the motion much easier than static or sliding friction force. The two activities show how circular or cylindrical objects work on rolling friction.

Important Questions on Rolling Friction

MEDIUM
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Moving Things, People and Ideas>Friction>Rolling Friction> Q 1

What is rolling friction? Why is wheel considered a great invention?

EASY
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Moving Things, People and Ideas>Friction>Rolling Friction> Q 2

Define rolling friction force.

EASY
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Moving Things, People and Ideas>Friction>Rolling Friction> Q 3

In a ball bearing, metallic balls are arranged in a ring form.

EASY
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Moving Things, People and Ideas>Friction>Rolling Friction> Q 4

It is easier to slide than rolling an empty cylinder.

EASY
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Moving Things, People and Ideas>Friction>Rolling Friction> Q 5

Rolling friction can be more than static friction.