The document introduces simple machines and their classifications, explaining their function as devices that make work easier. It details the different types of levers—first class, second class, and third class—highlighting their mechanics and examples. The content includes interactive elements for review and comprehension.

1. PREPARED BY MISS SALIHA RAIS
SIMPLE MACHINES

2. Name five
machines
in your
daily life.
Does your list
matched any
of these?

3. What is a simple machine?
 A Machine is any device
which helps to make
work easier for us.
 Tools such as a screw
driver, a pair of tongs
and a pair of scissors are
called Simple
Machines.

4. Types of
machines
Force
Magnifiers
Movement
Magnifiers

5. FORCE MAGNIFIERS
 Magnifier--- magnify
 Machines which can
overcome a large force
using a small force are
called Force
magnifiers.
 For example: Car jack.

6. MOVEMENT MAGNIFIERS
 Movement--- distance
covered
 Magnifier--- magnify
 Machines which provide
a bigger movement from
a smaller movement are
called Movement
magnifier or Distance
multiplier.

7. LEVER- A SIMPLE MACHINE
 A lever is a simple machine which turns about a fixed
point called the Fulcrum (F) when a force called
Effort (E) is applied to overcome a resisting force
known as the Load (L).

8. TYPES OF LEVER
First Class
Lever
Second
Class Lever
Third Class
Lever

9. 1. FIRST CLASS LEVER
 Fulcrum is between the
effort and load.
 It produce a large force
from a small force (L>E).
 Effort moves a longer
distance than the load.
 Fulcrum is further away
from the effort than the
load to increase the
turning effect of force of
the effort.

10.  L>E
 Distance covered by
effort is more.
 Fulcrum is away from the
effort.

11. EXAMPLES OF FIRST CLASS LEVER

12. 2. SECOND CLASS LEVER
 Load is between the
fulcrum and effort.
 It produce a large force
from a small force (L>E).
 Fulcrum is further away
from the effort than the
load to increase the
turning effect of force of
the effort.

13.  L>E
 Fulcrum is away from the
effort.

14. EXAMPLES OF SECOND CLASS LEVER

15. 3. THIRD CLASS LEVER
 Effort is between the
fulcrum and Load.
 It produce a large
movement from a small
movement.
 The effort moves a
shorter distance but the
load moves a longer
distance.
 A large force is used to
move a small load (E>L)

16.  Produce large movement
from small movement.
 Effort moves a shorter
distance, but load a
larger distance.
 E>L

17. EXAMPLES OF THIRD CLASS LEVER

18. RAISE YOUR HANDS IF YOU
WANT TO ANSWER A
QUESTION!
LET’S HAVE A QUICK
REVIEW…..

19. YOU HAVE 2 MINUTES TO LEARN THIS
PICTURE

20. NOW, Fill in the given chart.
TYPE OF LEVER POSITION OF F, E AND L
1.
2.
3.

21. Fill in the given chart.
TYPE OF LEVER POSITION OF F, E AND L
First class lever F is between L and E
Second class lever L is between F and E
Third class lever E is between F and L

22. HURRY UP! REVISE AGAIN

23. GUESS THE CLASS OF LEVER…!
 THIRD CLASS LEVER

24.  FIRST CLASS LEVER

25.  THIRD CLASS LEVER

26.  SECOND CLASS LEVER

27. JAZAKALLAH!