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!