There are several different types of gears.

The worm and wheel
is often used in toy cars 
to drive the wheels 
from a motor. 

<p>The worm and wheel<br>is often used in toy&nbsp;cars&nbsp;<br>to drive the wheels&nbsp;<br>from a motor.&nbsp;</p>

Bevel gears are used 
to change the direction 
of force to a 90º angle. 
A kitchen hand whisk is 
a good example.

<p>Bevel gears are used&nbsp;<br>to change the direction&nbsp;<br>of force to a 90º angle.&nbsp;<br>A kitchen hand whisk is&nbsp;<br>a good example.</p>

Rack and pinion gears
are used for the steering 
mechanism on many cars.

<p>Rack and pinion gears<br>are used for the steering&nbsp;<br>mechanism on many cars.</p>

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