The inclined plane and the lever are known as the two "parent" machines. It is the two families in which all the other simple machines are sorted into. All the other simple machines are based on these two. The ones that belong within the lever family are the wheel and axle, the pulley, and of course, the lever itself. The ones that belong to the inclined plane are the inclined plane itself, the wedge, and the screw.
The screw simply a twisted inclined plane.
The wheel and axle is a lever that can rotate in a circular motion around its fulcrum, or a circular lever.
The pulley has a turning point at which the rope is hung over, just like a lever. The shape of the wedge resembles the inclined plane and has its basic principles based after it, however it is used for a different purpose than the inclined plane.
The inclined plane and the lever are known as the two "parent" machines. It is the two families in which all the other simple machines are sorted into. All the other simple machines are based on these two. The ones that belong within the lever family are the wheel and axle, the pulley, and of course, the lever itself. The ones that belong to the inclined plane are the inclined plane itself, the wedge, and the screw.
The screw simply a twisted inclined plane.
The wheel and axle is a lever that can rotate in a circular motion around its fulcrum, or a circular lever.
The pulley has a turning point at which the rope is hung over, just like a lever. The shape of the wedge resembles the inclined plane and has its basic principles based after it, however it is used for a different purpose than the inclined plane.
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