What is the difference between first order and second order lever?

The primary difference between first-order and second-order levers lies in the arrangement of the load, effort, and fulcrum. In a first-order lever, the fulcrum is positioned between the load and the effort, as seen in a seesaw. In contrast, a second-order lever has the load situated between the fulcrum and the effort, exemplified by a wheelbarrow. This configuration affects the mechanical advantage and the way force is applied to lift the load.