Simple machines

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SimpleSimple
MachinesMachines
SOL 3.2
By Ms. Weinberg
Adapted by K. Green
ITRT – Suffolk City Schools

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Simple machines are tools
used to make work easier.

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You have probably used some simple
machines, but did not realize that they
were actually called simple machines!

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Simple machines do not make less
work; they just make it easier to do work.
It would be hard to cut this
wood without the saw!

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There are 6 different types of
simple machines:
•(1)lever
•(2)screw
•(3)pulley
•(4)wheel & axle
•(5)inclined plane
•(6)wedge

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6 Simple Machines6 Simple Machines

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(1) LEVER
A lever is a stiff bar that moves about a
fixed point (fulcrum).
A lever is used to push, pull, or lift things.

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A shovel is an example of a lever.
A seesaw is another example of a lever.

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(2) SCREW
A screw is an inclined plane wrapped
around a cylinder or cone.
A common use of the screw is to hold
objects together.

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A jar lid and a wood screw are examples of
a screw.
So far we have learned about 2 types of simple
machines: levers & screws….

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(3) PULLEY
A pulley is a wheel that has a rope
wrapped around it.
Pulleys can be used to lift heavy objects
by changing the direction or amount of the
force.

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A flagpole uses a pulley to raise the flag.
Now we have learned about 3 types of simple
machines: levers, screws, and pulleys…..

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(4) WHEEL & AXLE
A wheel & axle consists of a rod attached
to a wheel.
A wheel & axle makes it easier to move
or turn things.

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A bicycle wheel, roller skates, and a doorknob
are all examples of a wheel & axle.
We now know about 4 types of simple machines:
levers, screws, pulleys, and wheels & axles.

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(5) INCLINED PLANE
An inclined plane is a flat surface that is
raised so that one end is higher than the
other.
An inclined plane helps move heavy
objects up or down.

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A ramp is an example of an inclined
plane.
Let’s add inclined plane to our list of simple
machines (along with levers, screws, pulleys, and
wheels & axles).

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(6) WEDGE
A wedge is wide at one end and pointed
at the other to help cut or split other
objects.

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Examples of wedges: a knife or an ax

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Now you know about the 6 types of
simple machines:
(1) LEVER
(2) SCREW
(6) WEDGE
(3) PULLEY
(4) WHEEL &
AXLE
(5) INCLINED
PLANE

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Simple MachineSimple Machine
Video & QuizVideo & Quiz

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Simple Machine WebsitesSimple Machine Websites
• Information
• More Links & Information
• EdHead
– Click the Green, Start Box
• DirtMeister
– Simple Machines

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These simple machines make work
easier! Can you Name them?

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