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A�Quick�Guide�to��
Wheels�and�Axles
The wheel and axle mechanism has been in
use for about 5000 years. Many children are
familiar with the wheel and axle as it is used
in bicycles, cars and the vehicles they make
themselves in Design and Technology lessons.
They recognize it as something that helps other
things move easily.
They are perhaps less familiar with the use
of a wheel and axle as a simple machine
that helps make other mechanisms work.
Doorknobs, water taps, screwdrivers and
handles attached to winches and other types
of machinery are all examples of the wheel
and axle concept in action.
A simple machine is a tool that makes it easier
to do things. Using a simple machine does not
change the task to be undertaken; it simply
makes the job easier by changing the way it
can be done.
What is a wheel and axle?
A wheel and axle is a round disk (the wheel)
with a rigid rod (the axle) connected through
the centre of the wheel so that when one turns,
so does the other.
The wheel may be a solid, circular disk, such
as a car wheel, waterwheel, doorknob, water
tap, screwdriver or a gear wheel.
Wheel
Axle
Wheel
Axle
Wheel
Axle
Wheel
Axle
Education
®
5


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