DIGITAL PLAN BED DULUMONI BORAH SCIENCE PLAN.pptxDULUMONI BORAH SCIENCE .ppsx

DIGITAL PLAN BED DULUMONI BORAH SCIENCE PLAN.pptx

1. Identification of Data:
NAME OF THE SCHOOL:
REBAKANTA BARUAH
PUBLIC HIGH SCHOOL
Class:VIII-B
Sub:Science
Topic: Friction
Number of students: 22
Date:21/05/2024
Name of the teacher:
DulumoniBorah
Roll No:17
Time: 40 minutes
Average age of pupils:
12+
Textbook:Science
DIGITAL LESSON PLAN

2. TEACHING POINTS
1) CONCEPT OF FRICTION
2) FACTORS AFFECTING FRICTION
3) APPLICATION OF FRICTION IN DAILY
LIFE

3. Specific Objectives:
KNOWLEDGE :
Afterteacher’sdiscussionallthepupilwillbeable
todefinefriction.
Afterteacher’sdigitalpresentationallthepupilwill
beabletosaythedirectionoffrictionalforceacton
movingobject.
Afterteacher’sdigitalpresentationallthepupilwill
beabletosaythethreefactorsaffectingfriction.

4. Understanding:
After teacher’s digital presentation
most of the pupil will be able to give
examples of friction they have seen in
their daily life.
After teacher’s digital presentation
most of the pupil will be able to
explain the dependence of friction on
the nature of the surface.

5. Application:
1) After teacher’s digital presentation a few
pupil will be able to give reason why more
force is required to pull heavier object than
the lighter object on the same surface.
After teacher’s digital presentation a few
pupil will be able to analyse why the
football players use shoes with spike.

6. Skill:
After teacher’s digital presentation
few pupil will be able to construct
model using application of frictional
force in daily life.
STUDENT’S PREVIOUS KNOWLEDGE:
Students already knows about concept
of force ,contact and non contact force
,concept of object in motion and rest.

7. Introduction:
How many of you know to ride
bicycle ?
How do we slow down a bicycle?
Why the bottom surface of our
shoes have irregularities?
What happens when we steps on
a banana peel?
The teacher will ask students the following question.

8. Announcement of the topic:
Being satisfied with the pupil's
answers the teacher will
announce the topic
“FRICTION”

9. Presentation:
1.FRICTION:
Friction is defined as the
resistance offered by the
surfaces that are in
contact when they move
past each other.
For example, we use car
brakes if we want to stop or
slow down because of the
friction created between
the brakes and wheels that
slow/stop the car down.

10. Evaluation
An apple is falling
downward. What are the
forces action on it?
Is the apple is
experiencing frictional
force?
If yes ,what is the
direction of frictional
force?
?
?
?

11. 2. Factors Affecting Friction
The force of friction may alter depending on
the following factors that affect it:
.
1.NATURE OF THE
SURFACE
•When two smooth surfaces are in
contact, then the degree of friction
between them is small because the
interlocking between smooth
surfaces is less.
When two rough surfaces in contact,
then the degree of friction between
them is large because the interlocking
of between rough surfaces is too
much.

12. 2.PRESSURE BETWEEN TWO
SURFACES
•The force of friction increases when the pressure
between the two surfaces increases.Theforce of
friction is proportional to the weight of the object
placed on the surface.Due to this it is easier to move a light
weighted object placed on a surface than a comparably heavier
object
3. Area of Contact:-with the increase in area of
contact ,Pressure exerted by the object on the surface
decreases which reduces friction.
FACTORS AFFECTING FRICTION

13. The teacher will explain the factors
affecting friction by showing a video .
https://youtu.be/zozUN91be
dk?si=ofWFQp0GJarIUx_v

14. Applications of Friction
•Friction finds application when matchsticks
are ignited.
•Motion of pistons in a cylinder is an
application of friction.
•It is possible to write on books and board as
there is friction between pen and the board.

15. Evaluation
•Why more force is required to pull a
heavier object than a lighter object on
the same surface?
•Why there are wheels are given
on trolley bags?

16. ACHIEVING CLOUSER:
GENERALISATION:
‘Friction‘ is a force that resists motion of
sliding or rolling of one object moving
relative to another. It is a result of the
electrostatic attraction between the charged
particles of two touching surfaces.
Factors affecting friction are –
•nature of the surface
•weight of the object
•area of contact

17. Evaluation
What enables us to fix nails in a
wall and knots to be tied?
Why will a pencil write on a
paper, but not on a glass?
How lubricants work?.

18. HOME ASSINMENT:
Q1. Friction is a necessary evil.
Establish.
Q2. Suggest ways to reduce
unnecessary friction in daily life.