open wikipedia design.
An early printing press machine
machine is a thing that is created by people to make work easier. It is a tool or invention which multiplies the effect of human effort. The machine produces a mechanical advantage.
Some machines have many parts that move. Examples are
bicycles and clocks.
Some machines do not have parts that move. Examples are
computers and telephones.
People have used machines since before there was
Often a machine will change one form of
energy to another form of energy. Simple machines increase or change the direction of a force.
There are six 'simple machines'. They are:
Compound machines are made up of two or more simple machines.
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