What does the principle of leverage allow a lever to accomplish?

The principle of leverage allows a lever to lift an object with less effort by using a fulcrum to amplify the input force. When a force is applied to one end of the lever, the lever arm (the distance from the fulcrum to where the force is applied) increases the output force at the other end. This means that a smaller input force can move a heavier load, as long as the input force is applied at a sufficient distance from the fulcrum. By effectively redistributing the effort required to lift the object, the lever makes it easier to move heavy loads, thus demonstrating the mechanical advantage gained through leverage.