This document discusses simple machines including levers, wheels and axles, and pulleys. It explains that these machines make work easier by changing either the direction or amount of force required. Levers are described as having a fulcrum, load, and force. There are three types of levers depending on the arrangement of these components. Wheels and axles use a wheel rotating around a post or axle to change the strength of a turning force. Pulleys use a wheel and rope to lift loads, requiring less force by pulling down to lift up. The objectives are to understand how levers and pulleys are machines that make work easier.

2. Ch. 10 , Lesson 5
( Levers and pulleys )
• How can you make work
easier?
•
Is a tool that makes work
easier to do.
What machines do?
can change the direction of
force you need to do work.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
2
machine
1

3. Ch. 10 , Lesson 5
( Levers and pulleys )
• some machines change both
the direction and amount of
force you need to do work.
•
• machine can change the
amount of force you need to do
work.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
3
2
3

4. Ch. 10 , Lesson 5
( Levers and pulleys )
• A machine with few or no
moving parts.Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
4
Simple machine

5. lever

6. Ch. 10 , Lesson 5
( Levers and pulleys ) Is a straight bar that moves
on a fixed point.
All levers have 3 important
points.
• Load fulcrum force
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
6
Lever1

7. Ch. 10 , Lesson 5
( Levers and pulleys )
load the object being
lifted or moved.
force the push or pull
that moves the lever.
fulcrum the point
where the lever turns.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
7
A
B
C

8. Ch. 10 , Lesson 5
( Levers and pulleys )
• Are there different kinds
of Levers?
• There are 3 types according to
arrange of force, fulcrum and
load.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
8
1-the fulcrum is
between the force and
the load .
Ex. pliers
2-the force is between
the fulcrum and the
load .
Ex. Baseball bat
3-the load is between
the force and the
fulcrum
Ex. wheelbarrow

9. wheel and axle
• ex: doorknob
• wheel=knob
• axle=post that
attaches to its
center

10. Ch. 10 , Lesson 5
( Levers and pulleys ) It has a wheel that turns on
a post.
The post is called axle
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
10
Wheel and axle2

11. Ch. 10 , Lesson 5
( Levers and pulleys )
It makes work easier by
change strength of the
turning force.
The wheel turns a long
distance , the axle turns a
short distance.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
11

12. Ch. 10 , Lesson 5
( Levers and pulleys )
Other examples for wheel
and axle:
A windlass a bucket tied to
a rope to raise water from a
well.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
12

13. pulley

14. Ch. 10 , Lesson 5
( Levers and pulleys ) It uses a wheel and a rope to
lift a load.
You pull down to lift up.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
14
pulley3

15. Ch. 10 , Lesson 5
( Levers and pulleys )
We have 2 kinds of pulleys
One-wheel two-wheel
Pulley pulley
The force less force is
And load needed to
Are equal move load
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
15