Levers make it easier to lift heavy materials, remove tight objects and cut items. A first-class lever has a fulcrum in the center, between the effort -- or force -- and the load, the object being moved or lifted. A second-class lever has a fulcrum at one end and a load in the middle. A third-class lever has a fulcrum at one end and a load at the opposite end. Everyday levers help you accomplish tasks that would otherwise be too heavy or cumbersome to maneuver.
TL;DR (Too Long; Didn't Read)
Many simple tools incorporate levers, including hammer claws, wheelbarrows, bottle openers, scissors and tongs.
Hammer Claws
Hammer claws are common levers that help you remove embedded nails in wood or other hard surfaces. Hammer claws are first-class levers because the fulcrum is at the base of the hammer head, and you use effort, also known as force, to lift the handle and pry materials with the metal-claw end. A first-class lever is similar to a traditional see-saw because applied force at one end raises the other end, thanks to the fulcrum creating a pivot point in the middle.
Weight-Bearing Wheelbarrows
Wheelbarrows are helpful everyday tools because they allow you to transport loads that are too bulky or heavy to carry with your arms. A wheelbarrow is a second-class lever because the front wheel serves as the fulcrum. The weight-bearing load rests in the center of the wheelbarrow, and you use human force to lift the handles on the other end to roll the wheelbarrow where you want it to go.