Friction is the force that resists the motion of objects in contact with each other and is caused by irregularities in the surfaces in contact. The different types of friction include static, sliding, and rolling friction and are affected by factors like the type of surface and amount of force pressing the surfaces together. While friction provides advantages like allowing us to walk without slipping, it also has disadvantages as it slows movement and produces unwanted heat, requiring more energy to overcome. Methods like lubrication and using rollers can help reduce friction.

1. WELCOME

2. FRICTION

3. FRICTION IS THE FORCE WHICH RESISTS
THE MOTION OF OBJECTS OR SURFACES.

4. Due to the interlocking of
irregularities between the two
surfaces in contact
CAUSE OF FRICTION

5. •Kind of surface.
•Amount of force pressing the
surface together.
FACTORS AFFECTING
FRICTION

6. Static friction
Sliding friction
Rolling friction
DIFFERENT TYPES OF FRICTIONS

7. • Use lubricants like powder or oil or
grease.
• Use rollers or wheelers.
• Use ball bearings.
METHODS TO REDUCE
FRICTION

8. • To walk or run without slipping.
• To write with a pen or pencil on a
paper.
• To hold objects steadily in hands.
• To slow down a vehicle when the
break is applied.
ADVANTAGES OF FRICTION

9. • Slows down the movement of
objects.
• Produces unnecessary heat and
damages machines.
• More energy is needed to move an
object.
DISADVANTAGES OF FRICTION

10. THE END