ICSE Class 6 > Class 6 Notes > Physics > PPT: Friction
PPT: Friction
| Download, print and study this document offline |
Please wait while the PDF view is loading
Page 1
CHAPTER - 12
FRICTION
Page 2
CHAPTER - 12
FRICTION
1) Force of friction :-
Force of friction is the force which opposes the motion of an object
over a surface.
The force of friction acts between the object and the surface.
Eg :- A ball rolling on ground gradually slows down and comes to
rest due to force of friction between the ball and the ground.
If we stop pedalling a bicycle, it gradually slows down and
comes to a stop due to force of friction between the wheel and
the road.
Page 3
CHAPTER - 12
FRICTION
1) Force of friction :-
Force of friction is the force which opposes the motion of an object
over a surface.
The force of friction acts between the object and the surface.
Eg :- A ball rolling on ground gradually slows down and comes to
rest due to force of friction between the ball and the ground.
If we stop pedalling a bicycle, it gradually slows down and
comes to a stop due to force of friction between the wheel and
the road.
2) Factors affecting friction :-
Friction depends upon two factors. They are :-
i) Nature of the surfaces in contact. ( The smoothness of the
surfaces).
ii) How hard the surfaces press together.
Friction is less on a smooth surface.
Friction is more on a rough surface.
Page 4
CHAPTER - 12
FRICTION
1) Force of friction :-
Force of friction is the force which opposes the motion of an object
over a surface.
The force of friction acts between the object and the surface.
Eg :- A ball rolling on ground gradually slows down and comes to
rest due to force of friction between the ball and the ground.
If we stop pedalling a bicycle, it gradually slows down and
comes to a stop due to force of friction between the wheel and
the road.
2) Factors affecting friction :-
Friction depends upon two factors. They are :-
i) Nature of the surfaces in contact. ( The smoothness of the
surfaces).
ii) How hard the surfaces press together.
Friction is less on a smooth surface.
Friction is more on a rough surface.
Friction is more if the surfaces are
pressed harder.
Friction is less if the surfaces are
not pressed harder.
Page 5
CHAPTER - 12
FRICTION
1) Force of friction :-
Force of friction is the force which opposes the motion of an object
over a surface.
The force of friction acts between the object and the surface.
Eg :- A ball rolling on ground gradually slows down and comes to
rest due to force of friction between the ball and the ground.
If we stop pedalling a bicycle, it gradually slows down and
comes to a stop due to force of friction between the wheel and
the road.
2) Factors affecting friction :-
Friction depends upon two factors. They are :-
i) Nature of the surfaces in contact. ( The smoothness of the
surfaces).
ii) How hard the surfaces press together.
Friction is less on a smooth surface.
Friction is more on a rough surface.
Friction is more if the surfaces are
pressed harder.
Friction is less if the surfaces are
not pressed harder.
3) Cause of friction :-
Friction is caused due to the interlocking of irregularities between the
two surfaces in contact.
Smooth surfaces have minute irregularities between the two surfaces.
Rough surfaces have larger irregularities between the two surfaces.
So force of friction is more if the surfaces are rough.
Read MoreFAQs on PPT: Friction
| 1. What is friction and why does it slow things down? |  |
Ans. Friction is a force that opposes motion between two surfaces in contact. It acts opposite to the direction of movement, causing objects to slow down or stop. This happens because rough surfaces have tiny irregularities that interlock, creating resistance. Friction is essential in daily life-without it, we couldn't walk, vehicles couldn't brake, and objects would slide endlessly.
| 2. What are the different types of friction in Class 6 physics? | |
Ans. The main types of friction are static friction (prevents motion when force is applied), sliding friction (opposes movement between surfaces already in contact), and rolling friction (resists rolling motion of objects). Static friction is typically stronger than sliding friction. Rolling friction is the weakest and is why wheels are efficient for transport. Understanding these distinctions helps explain why pushing a stationary box requires more effort than maintaining its motion.
| 3. How does friction affect speed and motion in real situations? | |
Ans. Friction continuously removes energy from moving objects, reducing their speed until they stop. A sliding book on a desk decelerates due to friction between surfaces. In vehicles, friction in brakes converts kinetic energy into heat, stopping the car safely. Athletes experience friction with the ground during running, which enables them to accelerate and change direction. Lubricants reduce friction, allowing machines to run faster with less energy loss.
| 4. Why is friction sometimes helpful and sometimes harmful? | |
Ans. Friction is helpful when it enables grip (shoes on floors, tyres on roads) and prevents unwanted sliding. It's harmful when it causes energy loss in machinery, generates excessive heat, or increases wear on components. In engines, friction between moving parts causes damage, so lubricating oil reduces it. The key is controlling friction-using it where needed and minimizing it where it wastes energy or causes problems.
| 5. What factors affect the amount of friction between surfaces? | |
Ans. Friction depends on the roughness of surfaces (rougher surfaces create more friction) and the normal force pressing surfaces together (heavier objects experience greater friction). Material type also matters-rubber on concrete creates more friction than ice on ice. Smoother, polished surfaces reduce friction compared to rough textures. Students can observe these factors using friction experiments with different material combinations and varying weights to understand how friction changes.
About this Document
11.9K Views
4.65/5 Rating
Apr 18, 2026 Last updated
Document Description: PPT: Friction for Class 6 2026 is part of Physics Class 6 ICSE preparation. The notes and questions for PPT: Friction have been prepared according to the Class 6 exam syllabus. Information about PPT: Friction covers topics like and PPT: Friction Example, for Class 6 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for PPT: Friction.
Introduction of PPT: Friction in English is available as part of our Physics Class 6 ICSE for Class 6 & PPT: Friction in Hindi for Physics Class 6 ICSE course. Download more important topics related with notes, lectures and mock test series for Class 6 Exam by signing up for free. Class 6: PPT: Friction
Description
PPT: Friction of Physics Class 6 ICSE - covers important aspects of the topic & is important for the Class 6 exam. Download the presentation on EduRev.
Information about PPT: Friction
In this doc you can find the meaning of PPT: Friction defined & explained in the simplest way possible. Besides explaining types of PPT: Friction theory, EduRev gives you an ample number of questions to practice PPT: Friction tests, examples and also practice Class 6 tests
Related Searches
pdf , past year papers, mock tests for examination, Semester Notes, Summary, practice quizzes, Sample Paper, ppt, Previous Year Questions with Solutions, PPT: Friction, video lectures, Extra Questions, shortcuts and tricks, Free, PPT: Friction, study material, MCQs, Important questions, Viva Questions, Exam, PPT: Friction, Objective type Questions;