Everythingyou need to know about how machines work.

How many simple machines do you use every day? Probably more than you realize! Machines make work easier— helping break things apart, lift heavy objects, and

Introduces six simple machines, describing how they work in more complex machinery and how they are used every day.

Introduces simple machines, including screws, levers, wedges, and pulleys, describes how each makes everyday life easier, and provides activities demonstrating

Only elementary math skills are needed to follow this manual, which covers many machines and their components, including hydrostatics and hydraulics, internal c