2. Wedge
● A wedge is a machine
that pushes materials
apart and cuts things.
● A kitchen knife is a
wedge that cuts food
and it is found in the
kitchen
● A pair of scissors is
also a wedge and it
cuts paper and it can
be found in my pencil
case
3. Wheel and Axle
● The wheel and axle
machines make it easy to
move things by rolling
them and reducing friction.
● A car is a wheel and axle
because it makes it easier
to move people from one
place to another.
● A wheel barrow is a wheel
and axle because it can
move an object easier by
rolling it anywhere.
4. Lever
Levers are simple machines
that makes lifting weight
easier by using a fulcrum to
redirect force over a long
distance.
A broom is a lever because
the handle help make it
easier to clean.
A screw driver is a lever be-
cause the fulcrum is closer
to the load which reduces
the force to screw some-
thing together.
5. Inclined Plane
● An inclined plane is a simple
machine that makes it easier to
move objects upward, but you
have to go further horizontally.
● Stairs are inclined planes
because they make it easier to
go up and down each floor.
● A sidewalk ramp make objects
easier to move and carry heavy
objects out of a truck or car.
6. Screw
● A screw turns rotation into
lengthwise movement and
takes many twist which
holds things together.
● A jar lid is a screw because
it turns and takes many
twist to open and close it.
● A light bulb is a screw
because it has a turning
rotation that takes a twist to
provide light.
7. Pulley
● A pulley makes lifting
things with a rope easier
by redirecting force and
the addition of additional
pulleys.
● The window blind is a
pulley because it helps pull
up the shade.
● The garage door is also a
pulley because it helps lift
the door so cars and other
big objects can go through.
8. Compound Machines
● A compound machine is
combining two or more
simple machines to work
together.
● A bike is a compound
machine because the
wheels of the bike is a
wheel and axle and the
gear shifts and bike
handles are levers.
● A garden hoe is a complex
machine because the
handle is a lever and the
blade is a wedge.
