Machines help people do work.
A machine helps workers perform a task with less effort. Levers are common machines that you can find everywhere, from your family's car to your kitchen to your classroom. You probably use levers every day, but you may be calling them by other names, such as scissors, brakes, can openers, or wrenches. Levers and other simple tools multiply foce. They allow you to perform work with less effort or force-and to do things that require more force than you could produce.