A simple machine is a tool that helps us do work. They use clever shapes to help us move, lift, cut and other types of work. Learn more about the inclined plane, the pulley, the lever, the wheel and ...

One of the six simple machines, a screw is nothing more than an inclined plane wrapped around a center pole. While today screws come in standard sizes, and typically are tightened by turning clockwise ...

Screw machines are specialized automated metalworking lathes that were first developed in Switzerland during the late 1800s to produce large numbers of identical parts such as screws. At that time, ...

Lesson that teaches children what screws are and what they do. Gain a deeper understanding of what screws are by making your own in this interactive lesson. Usage conditions apply ...

Find out more about the wheel and axel, the lever, and the wedge. Find out more about three of the six simple machines: the wheel and axel, the wedge, the lever. Simple machines like these help us do ...

They fuse us and unravel us. They keep the roof over our head and the wolf from the door. They knit our bones together and keep the water running. They allow us to see, fly, write in elegant cursive ...