What is a pulley and how is one made? How do pulleys work? How are they used? Find out the answers to all these questions and more!

What do sailboats and theater curtains have in common? Your readers will learn the answer; it's pulleys. The pulley plays an important role in modern daily life. This simple machine makes raising and lowering heavy loads much easier. From fixed pulleys to moveable and compound pulley systems, readers gain an

Pulleys make it easier to raise and lower heavy loads. We can find them all around us, on boats, bikes, flagpoles, and many more places. Pulleys are made up of an axle and a wheel with a groove around its edge. The grove keeps a rope, chain, or cable from

A wedge is simply a triangular tool made of two inclined planes, but it can take on many complex jobs. These include cutting objects into pieces, holding objects in place, and lifting heavy loads. When attached to a handle, a wedge becomes a knife, ax, or shovel that makes even

Following the scientific process, this title provides instructions on how to conduct experiments that help students gain a better understanding of levers and pulleys.