simple machines - peach county · pdf filewhat is a simple machine? a simple machine has few...
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![Page 1: Simple Machines - Peach County · PDF fileWhat is a Simple Machine? A simple machine has few or no moving parts. Simple machines make work easier](https://reader031.vdocument.in/reader031/viewer/2022030412/5a9e2fcd7f8b9a0d7f8b67b7/html5/thumbnails/1.jpg)
Simple Machines
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What is a Simple Machine?
A simple machine
has few or no
moving parts.
Simple machines
make work easier
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Wheels and Axles
The wheel and axle are a simple machine
The axle is a rod that goes through the wheel which allows the wheel to turn
Gears are a form of wheels and axles
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Examples of wheels and axles
Steering wheel on a
car
Tires (wheels) and
axle of a car
Door knob
Screw driver
Hand-held mixer
Windmill
Ferris wheel
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Pulleys
Pulley are wheels
and axles with a
groove around the
outside
A pulley needs a
rope, chain or belt
around the groove
to make it do work
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Examples of Pulleys
Clothes line
Flag pole
Block and tackle-
system of pulleys
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Inclined Planes
An inclined plane is
a flat surface that is
higher on one end
Inclined planes
make the work of
moving things easier
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Examples of inclined planes
Ramps
Stairs
Bath tubs
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Wedges
Two inclined planes joined back to back.
Wedges are used to split things.
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Examples of wedges
Knives
Ax heads
Nails
Saw blade
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Screws
A screw is an inclined plane wrapped around a shaft or cylinder.
The inclined plane allows the screw to move itself when rotated.
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Example of Screws
Screw
Jar lid
Drill bit
Light bulb
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Levers-First Class
In a first class lever
the fulcrum is in the
middle and the load
and effort is on
either side
Think of a see-saw
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Examples of first class levers
See saw
Row boat
Crow bar
Scissors
Pliers
Hedge clippers
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Levers-Second Class
In a second class
lever the fulcrum is
at the end, with the
load in the middle
Think of a
wheelbarrow
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Examples of second class
levers
Wheelbarrow
Hand truck
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Levers-Third Class
In a third class lever
the fulcrum is again
at the end, but the
effort is in the
middle
Any extension of the
arm
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Examples of Third Class
Levers
Rake
Broom
Bat
Tennis racquet
mop
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Simple machines
Some examples of simple
machines fit in more than one
category; for example scissors are
levers and the blades are wedges
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Simple Machines
Simple Machines
can be put together
in different ways to
make complex
machinery