A lever is a simple machine that helps lift or move heavy objects with less effort. It consists of a long bar that pivots on a point called the fulcrum. By placing the fulcrum closer to the load, you can lift heavier items more easily. For example, using a lever, like a seesaw, allows one person to lift another by pushing down on one end. Levers come in different types, such as first-class, second-class, and third-class, depending on the arrangement of the load, effort, and fulcrum. Everyday examples include a crowbar used to pry open a lid or a wheelbarrow that helps carry heavy loads with less strain.