What is friction, laws of friction, types and normal force.

1. M.P.C AUTONOMOUS COLLEGE
TAKHATPUR, BARIPADA
COURSE : INTEGRATED B.ED.
PAPER : B.ED. (13P)
SEMESTER : VI
SESSION : 2022 – 2023
A REPORT ON
SELECTION OF A TOPIC AND DEVELOPMENT OF A SCRIPT
FOR POWERPOINT PRESENTATION
SUBJECT : ICT IN EDUCATION
TOPIC : FRICTION
PREPARED BY
UPASANA DAS
CLASS ROLL NO : BS20 – 842
EXAM ROLL NO : IB2620070

2. CONTENTS
WHAT IS FRICTION
LIMITING FRICTION
NORMAL FORCE
TYPES OF FRICTION
ANGLE OF FRICTION
CO-EFFICIENT OF FRICTION
LAWS OF STATIC FRICTION
LAWS OF DYNAMIC FRICTION
REDUCING FRICTION
INCREASING FRICTION
CONCLUSION
REFERENCE

3. WHAT IS FRICTION
When a body slide or tends to slide on a surface in which it is resting, a resisting
force opposing the motion is produced at the contact surface. This resisting
force is called friction or friction force.
FORCE OF FRICTION
MOTION
PUSHING
FORCE

4. LIMITING FRICTION
The maximum value of the friction force at which the body resting on
the another body start to slide. If Limiting friction force is “F” and
applied force is “P”.
Then
If F<P (no motion between bodies)
If F> P (no motion between two bodies)
If F = P (motion will be there)
DIRECTION OF MOTION

5. NORMAL FORCE
It is the net force compressing two parallel surface together and the
direction of the reaction force will be perpendicular to the surface on
which its act.
A B

6. TYPES OF FRICTIONS
Static Friction
Friction experienced by a body when it is at rest is called static friction.
Dynamic Friction
Friction experienced by a body when it is motion is called dynamic
friction.

7. TYPES OF FRICTION
Dynamic frictions is 2 types
Sliding Friction
Friction experienced by a body when it slides over another body, is
called sliding friction .
Rolling Friction
Friction experienced by a body when it rolls over another body is
called rolling friction.

8. ANGLE OF FRICTION
The minimum inclination of any plane to the horizontal is such that
the body resting on the inclined plane tend to move down the plane,
then this minimum inclination of the plane is known as angle of
friction.

9. CO-EFFICIENT OF FRICTION
It is defined as the ratio of the ratio of the limiting friction force to the
normal reaction force.
It is represented by the µ.
 it is given by µ =
Limiting friction
Normal reaction
FRICTION
APPLIED FORCE

10. LAWS OF STATIC FRICTION
The applied force will be equal in Magnitude with friction force.
The ratio of the limiting friction force to the normal reaction force is
called coefficient of static friction.
The force of friction is dependent on the roughness of the surface but
independent on the area of contact.
SHEAR REACTION FORCE
FRICTION

11. LAWS OF DYNAMIC FRICTION
The direction of the friction force will be opposite to the direction of
motion of the body.
The ratio of the dynamic friction to the normal reaction is a constant.
As we increase the speed f the moving body then the friction force
decrease.
STATIC FRICTION
SLIDING FRICTION
ROLLING FRICTION
ROLLING MOTION
SLIDING MOTION
NO MOTION

12. REDUCING FRICTION
To reduce the amount of friction, apply a lubricant between two
surfaces.
Motor oil, wax, and grease are examples.
Friction can also be reduced by rolling, rather than pushing, an object.

13. INCREASING FRICTION
Friction increases as surfaces are made rougher.
Friction increases when the force between two objects is increased.

14. CONCLUSION
Friction is needed to hold everything in the world.
Without friction between the shoes and the ground, you cannot walk
properly. If there is no friction, all of us would be sliding around
without any control over ourselves.
All of us write using either a pen or a pencil in our daily life but
without friction we can’t write.

15. REFERENCE
https://www.britannica.com/science/friction
https://studiousguy.com/examples-of-friction-in-everyday-life/
https://www.physicsgoeasy.com/friction-in-our-daily-life/
https://byjus.com/question-answer/give-10-examples-of-friction-in-
our-daily-life/

16. THANK YOU