1.
What are simple
and complex
machines?

2.
Machine
A machine is
something that help
us do work with less
effort.

3.
6 kinds of

4.
Inclined plane
It is a slanting
surface that
connects a
lower level to
a higher level.

5.
inclined plane

6.
Screw
It is an
inclined
plane
wrapped
around a
center post.

7.
screw

8.
Wedge
It has one or
more slanting
surfaces
which are
used to cut
things.

9.
Lever
It is a stiff
bar that
rests on a
fulcrum.

10.
lever

11.
lever

12.
Wheel and axle
• ex: doorknob
• wheel=knob
• axle=post that
attaches to its
center

13.
wheel and axle

14.
It has a wheel
which revolves
around an axle.
It is used to
move things
across the
ground more
easily.

15.
Pulley It changes the
direction of
motion to
which a force
is applied.

16.
pulley

17.
Complex machine- made of
more than one simple machine

18.
complex machine

19.
Simple Machines Game
• Simple Machines game
• http://staff.harrisonburg.k12.va.us/%7Emwampol
e/1-resources/simple-machines/index.html
• http://sunshine.chpc.utah.edu/javalabs/java12/m
achine/index.htm
• http://www.galaxy.net/~k12/machines/index.shtm
l
• http://www.quia.com/pages/hostetterscience.htm
l#simple
• How can we move our principal game