ALEX AMRON-COETZEE

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ALEX AMRON-COETZEE

• GRADE 8l
• 25-02-04

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CONTENTS

• Gears
• Levers
• Pulleys
• Bibliography

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GREARS
Gears are used to change speed in
rotational movement. To turn the gear one full
turn the other gear must turn 25/11 or
2.2727r turns.as the one gear turns clockwise
the other gear turns anti-clockwise.. By using
none divisible numbers the same teeth mesh only
every seventeen turns of the gear.
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LEVERS
Levers are an essential part of many mechanisms.
They can be used to change the amount, the
strength and the direction of movement. The
position of the force and the load are can be
swapped by moving them to different points on the
lever, different effects can be produced.
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PULLEYS
Pulleys are used to change direction of movement,
or to link parts of a mechanism together.
Pulleys can also be used as a way of gaining
mechanical advantage, trading speed of movement
for power
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BILIOGRAPHY

• www.flying-pig.co.uk/mechanisms/pages/levers.html