The document discusses the advantages and disadvantages of friction. It notes that friction allows for walking without slipping, driving cars without skidding, and writing with pencils. However, it also notes friction causes wear and tear of shoes and tires over time. Friction produces heat, such as when lighting a match. While necessary for many functions, friction also reduces efficiency of machines and motion.

1. Made by :-
Arpit Lekurwale

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Advantages and Disadvantages of
Friction

3.  What is friction ?
 Advantages of Friction
 Disadvantages of friction
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Advantages and Disadvantages of
Friction

4. Friction (frictional force) is a
force that acts in a opposite
direction to movement.
The force which always
opposes the motion of one
object over another, object in
contact with it , is called
friction.
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Advantages and Disadvantages of
Friction

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Friction

6.  It is because of the friction
between the sole of the shoe and
ground prevents us from slipping.
 While walking , we push the
ground backwards and the force
of friction acts in the opposite
direction (i.e. in the forward
direction) and prevents us from
slipping. By making the balance.
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Advantages and Disadvantages of
Friction

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8.  Walking on slippery ground is difficult because
friction on slippery ground is less due to
which we may slip.
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Friction

9.  It is because of the friction
between the tyres of car and
the road which enables car to
move forward without
skidding.
 If there were no friction , car
would stay where it was.
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Friction

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11.  It becomes sometimes difficult to drive and
control car on wet road.
 This is because of water present on road
reduces friction.
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Friction

12.  It is because of the friction between the tip of
the pencil ( or pen) and paper.
 Carbon particles from the pencil lead rubs off
from it, due to the friction, which appears as
black marks on the paper.
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Friction

13.  We can hold a glass tumbler in our hands
because of friction between the tumbler and
our hands.
 Similarly, we can pick up the books laying on
the desk by our hands.
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Friction

14.  Friction also produces heat.
 We rub matchstick against the rough side of a
matchbox, then friction between both of them
produces heat and this heat burns chemicals
present at the head of matchstick and it lights
up.
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Friction

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16.  When we walk on the road, tiny surfaces of the
shoe keep on breaking off slowly due to which
the soles of our shoes wear out slowly
 Due to which shoes get damaged and becomes
unfit to wear.
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Friction

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Friction

18.  Like the shoe tiny particles of tyres also
breakdown due to friction when they run on
road.
 The same thing also happens with the bicycles
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Friction

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Friction

20.  Brake pad is made of rubber
 When the brakes of the vehicles are applied a
lot of friction is produced
 Friction wears out the brake pads gradually
Before - After
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Friction

21.  The friction between the soles of
the shoes and wear away hard
stone steps slowly.
 Such type of staircase are usually
seen at :
 Railway station
 Offices
 Old Buildings
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Friction

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Advantages and Disadvantages of
Friction

23.  Friction reduces the motion of moving parts of
a machine . In fact all the moving things such
as (cars , buses, airplanes, boats, ships ,etc.) are
slowed down by friction.
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Advantages and Disadvantages of
Friction

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26.  Friction is a necessary evil
 We hate it sometimes but we also need it .
 It is very useful and but harmful too.
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