Page 79 - Supplement_Primary-1_Neat

WORKING TOGETHER
Organized Ideas

bicycle is an example of a compound machine. It is an assembly of
simple machines. Simple machines are basic mechanical objects

Athat are used to modify motion and force. Usually they have few or
no moving parts.
In a bicycle, simple machines work together to make travel easier than

walking. Let us look closer at the simple machines found in a bicycle and
how they work.

Rivet fastening
the saddle seat
Rear wheel (Screw)
(Wheel-and-

Paddle
(Lever)

Chain ring
and chains
(Pulley)

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