Answer:
The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined plane, the pulley, the screw, and the wedge, although the latter three are actually just extensions or combinations of the first three.
Answer:
The most important devices that made work easier are:
The wheel
The axle
The lever
The inclined plane
The pulley
The screw
The wedge
these are known as the the "six simple machines"
