Some believe that it is the amount of preasure that you put on a screw that drives it into the material such as wood. Very little pressure is needed as the screw pulls itself into the material by it thread.
machine
build it
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A lever is a simple machine that makes work easier by allowing you to lift or move objects with less force.
it makes you're work easier by making things move by quicker
it makes work easier by changing an input force into a larger output force.
A machine, or tool
a simple machine
computer
Simple machines such as levers and pulleys can make work easier for us.
A simple machine makes work easier by reducing the force which it takes to move something. Also it makes life eaiser, but taking shortcuts does not always help.
The pulley makes work of lifting easier then lifting by hand.